diff --git a/dll/win32/usp10/CMakeLists.txt b/dll/win32/usp10/CMakeLists.txt
index ff58b7ef42b..25b76c56420 100644
--- a/dll/win32/usp10/CMakeLists.txt
+++ b/dll/win32/usp10/CMakeLists.txt
@@ -15,7 +15,7 @@ list(APPEND SOURCE
     shape.c
     shaping.c
     usp10.c
-    usp10_internal.h
+    precomp.h
     ${CMAKE_CURRENT_BINARY_DIR}/usp10_stubs.c)
 
 add_library(usp10 SHARED
@@ -25,5 +25,5 @@ add_library(usp10 SHARED
 set_module_type(usp10 win32dll)
 target_link_libraries(usp10 wine)
 add_importlibs(usp10 advapi32 user32 gdi32 msvcrt kernel32 ntdll)
-add_pch(usp10 usp10_internal.h SOURCE)
+add_pch(usp10 precomp.h SOURCE)
 add_cd_file(TARGET usp10 DESTINATION reactos/system32 FOR all)
diff --git a/dll/win32/usp10/bidi.c b/dll/win32/usp10/bidi.c
index a06ff8c65bd..b0df781c82a 100644
--- a/dll/win32/usp10/bidi.c
+++ b/dll/win32/usp10/bidi.c
@@ -41,9 +41,19 @@
  * has been modified.
  */
 
-#include <windef.h>
+#include "config.h"
 
-#include <wine/list.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include "windef.h"
+#include "winbase.h"
+#include "wingdi.h"
+#include "winnls.h"
+#include "usp10.h"
+#include "wine/unicode.h"
+#include "wine/debug.h"
+#include "wine/heap.h"
+#include "wine/list.h"
 
 #include "usp10_internal.h"
 
@@ -682,8 +692,9 @@ static BracketPair *computeBracketPairs(IsolatedRun *iso_run)
     WCHAR *open_stack;
     int *stack_index;
     int stack_top = iso_run->length;
+    unsigned int pair_count = 0;
     BracketPair *out = NULL;
-    int pair_count = 0;
+    SIZE_T out_size = 0;
     int i;
 
     open_stack = heap_alloc(iso_run->length * sizeof(*open_stack));
@@ -692,55 +703,55 @@ static BracketPair *computeBracketPairs(IsolatedRun *iso_run)
     for (i = 0; i < iso_run->length; i++)
     {
         unsigned short ubv = get_table_entry(bidi_bracket_table, iso_run->item[i].ch);
-        if (ubv)
-        {
-            if (!out)
-            {
-                out = heap_alloc(sizeof(*out));
-                out[0].start = -1;
-            }
 
-            if ((ubv >> 8) == 0)
+        if (!ubv)
+            continue;
+
+        if ((ubv >> 8) == 0)
+        {
+            --stack_top;
+            open_stack[stack_top] = iso_run->item[i].ch + (signed char)(ubv & 0xff);
+            /* Deal with canonical equivalent U+2329/232A and U+3008/3009. */
+            if (open_stack[stack_top] == 0x232a)
+                open_stack[stack_top] = 0x3009;
+            stack_index[stack_top] = i;
+        }
+        else if ((ubv >> 8) == 1)
+        {
+            unsigned int j;
+
+            for (j = stack_top; j < iso_run->length; ++j)
             {
-                stack_top --;
-                open_stack[stack_top] = iso_run->item[i].ch + (signed char)(ubv & 0xff);
-                /* deal with canonical equivalent U+2329/232A and U+3008/3009 */
-                if (open_stack[stack_top] == 0x232A)
-                    open_stack[stack_top] = 0x3009;
-                stack_index[stack_top] = i;
-            }
-            else if ((ubv >> 8) == 1)
-            {
-                int j;
-                if (stack_top == iso_run->length) continue;
-                for (j = stack_top; j < iso_run->length; j++)
-                {
-                    WCHAR c = iso_run->item[i].ch;
-                    if (c == 0x232A) c = 0x3009;
-                    if (c == open_stack[j])
-                    {
-                        out[pair_count].start = stack_index[j];
-                        out[pair_count].end = i;
-                        pair_count++;
-                        out = HeapReAlloc(GetProcessHeap(), 0, out, sizeof(BracketPair) * (pair_count+1));
-                        out[pair_count].start = -1;
-                        stack_top = j+1;
-                        break;
-                    }
-                }
+                WCHAR c = iso_run->item[i].ch;
+
+                if (c == 0x232a)
+                    c = 0x3009;
+
+                if (c != open_stack[j])
+                    continue;
+
+                if (!(usp10_array_reserve((void **)&out, &out_size, pair_count + 2, sizeof(*out))))
+                    ERR("Failed to grow output array.\n");
+
+                out[pair_count].start = stack_index[j];
+                out[pair_count].end = i;
+                ++pair_count;
+
+                out[pair_count].start = -1;
+                stack_top = j + 1;
+                break;
             }
         }
     }
-    if (pair_count == 0)
-    {
-        heap_free(out);
-        out = NULL;
-    }
-    else if (pair_count > 1)
-        qsort(out, pair_count, sizeof(BracketPair), compr);
 
     heap_free(open_stack);
     heap_free(stack_index);
+
+    if (!pair_count)
+        return NULL;
+
+    qsort(out, pair_count, sizeof(*out), compr);
+
     return out;
 }
 
diff --git a/dll/win32/usp10/bracket.c b/dll/win32/usp10/bracket.c
index 69054649904..1509d572c92 100644
--- a/dll/win32/usp10/bracket.c
+++ b/dll/win32/usp10/bracket.c
@@ -2,7 +2,9 @@
 /* generated from http://www.unicode.org/Public/10.0.0/ucd/BidiBrackets.txt */
 /* DO NOT EDIT!! */
 
-const unsigned short /* DECLSPEC_HIDDEN */ bidi_bracket_table[768] =
+#include "wine/unicode.h"
+
+const unsigned short DECLSPEC_HIDDEN bidi_bracket_table[768] =
 {
     /* level 1 offsets */
     0x0100, 0x0110, 0x0110, 0x0110, 0x0110, 0x0110, 0x0110, 0x0110,
diff --git a/dll/win32/usp10/breaking.c b/dll/win32/usp10/breaking.c
index b6e31517443..9b12d9e63d5 100644
--- a/dll/win32/usp10/breaking.c
+++ b/dll/win32/usp10/breaking.c
@@ -18,7 +18,21 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  *
  */
+#include "config.h"
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
 
+#include "windef.h"
+#include "winbase.h"
+#include "winuser.h"
+#include "wingdi.h"
+#include "winnls.h"
+#include "usp10.h"
+#include "winternl.h"
+
+#include "wine/debug.h"
+#include "wine/heap.h"
 #include "usp10_internal.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(uniscribe);
diff --git a/dll/win32/usp10/indic.c b/dll/win32/usp10/indic.c
index fae5f43c61e..5a228e88dea 100644
--- a/dll/win32/usp10/indic.c
+++ b/dll/win32/usp10/indic.c
@@ -18,7 +18,21 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  *
  */
+#include "config.h"
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
 
+#include "windef.h"
+#include "winbase.h"
+#include "winuser.h"
+#include "wingdi.h"
+#include "winnls.h"
+#include "usp10.h"
+#include "winternl.h"
+
+#include "wine/debug.h"
+#include "wine/heap.h"
 #include "usp10_internal.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(uniscribe);
diff --git a/dll/win32/usp10/indicsyllable.c b/dll/win32/usp10/indicsyllable.c
index ead8735b9be..dbdac5d4ae6 100644
--- a/dll/win32/usp10/indicsyllable.c
+++ b/dll/win32/usp10/indicsyllable.c
@@ -3,7 +3,9 @@
 /*       and from http://www.unicode.org/Public/10.0.0/ucd/IndicPositionalCategory.txt */
 /* DO NOT EDIT!! */
 
-const unsigned short /* DECLSPEC_HIDDEN */ indic_syllabic_table[3312] =
+#include "wine/unicode.h"
+
+const unsigned short DECLSPEC_HIDDEN indic_syllabic_table[3312] =
 {
     /* level 1 offsets */
     0x0100, 0x0110, 0x0110, 0x0110, 0x0110, 0x0110, 0x0110, 0x0110,
diff --git a/dll/win32/usp10/linebreak.c b/dll/win32/usp10/linebreak.c
index 0c03e334c01..56bde66e9e0 100644
--- a/dll/win32/usp10/linebreak.c
+++ b/dll/win32/usp10/linebreak.c
@@ -2,7 +2,9 @@
 /* generated from http://www.unicode.org/Public/10.0.0/ucd/LineBreak.txt */
 /* DO NOT EDIT!! */
 
-const unsigned short /* DECLSPEC_HIDDEN */ wine_linebreak_table[7248] =
+#include "wine/unicode.h"
+
+const unsigned short DECLSPEC_HIDDEN wine_linebreak_table[7248] =
 {
     /* level 1 offsets */
     0x0100, 0x0110, 0x0120, 0x0130, 0x0140, 0x0150, 0x0160, 0x0170,
diff --git a/dll/win32/usp10/mirror.c b/dll/win32/usp10/mirror.c
index c8f34681653..23dab536c4a 100644
--- a/dll/win32/usp10/mirror.c
+++ b/dll/win32/usp10/mirror.c
@@ -2,8 +2,7 @@
 /* generated from http://www.unicode.org/Public/10.0.0/ucd/BidiMirroring.txt */
 /* DO NOT EDIT!! */
 
-#include <windef.h>
-#include <winnt.h>
+#include "wine/unicode.h"
 
 const WCHAR DECLSPEC_HIDDEN wine_mirror_map[3292] =
 {
diff --git a/dll/win32/usp10/opentype.c b/dll/win32/usp10/opentype.c
index 9b7827af65d..2d708a8c401 100644
--- a/dll/win32/usp10/opentype.c
+++ b/dll/win32/usp10/opentype.c
@@ -18,10 +18,21 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  *
  */
+#include <stdarg.h>
+#include <stdlib.h>
+
+#include "windef.h"
+#include "winbase.h"
+#include "wingdi.h"
+#include "winuser.h"
+#include "winnls.h"
+#include "usp10.h"
+#include "winternl.h"
 
 #include "usp10_internal.h"
 
-#include <winternl.h>
+#include "wine/debug.h"
+#include "wine/heap.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(uniscribe);
 
diff --git a/dll/win32/usp10/precomp.h b/dll/win32/usp10/precomp.h
new file mode 100644
index 00000000000..00da1b9083c
--- /dev/null
+++ b/dll/win32/usp10/precomp.h
@@ -0,0 +1,23 @@
+
+#ifndef _USP10_PRECOMP_H_
+#define _USP10_PRECOMP_H_
+
+#include <config.h>
+
+#include <stdarg.h>
+
+#define WIN32_NO_STATUS
+#define _INC_WINDOWS
+#define COM_NO_WINDOWS_H
+
+#include <windef.h>
+#include <winbase.h>
+#include <wingdi.h>
+#include <usp10.h>
+
+#include <wine/debug.h>
+#include <wine/unicode.h>
+
+#include "usp10_internal.h"
+
+#endif /* !_USP10_PRECOMP_H_ */
diff --git a/dll/win32/usp10/shape.c b/dll/win32/usp10/shape.c
index 946eba31bd2..ca084e7285f 100644
--- a/dll/win32/usp10/shape.c
+++ b/dll/win32/usp10/shape.c
@@ -18,9 +18,22 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  *
  */
+#include <stdarg.h>
+#include <stdlib.h>
+
+#include "windef.h"
+#include "winbase.h"
+#include "wingdi.h"
+#include "winuser.h"
+#include "winnls.h"
+#include "usp10.h"
+#include "winternl.h"
 
 #include "usp10_internal.h"
 
+#include "wine/debug.h"
+#include "wine/heap.h"
+
 WINE_DEFAULT_DEBUG_CHANNEL(uniscribe);
 
 #define FIRST_ARABIC_CHAR 0x0600
diff --git a/dll/win32/usp10/shaping.c b/dll/win32/usp10/shaping.c
index 4a5d4c9469f..82435ff2c31 100644
--- a/dll/win32/usp10/shaping.c
+++ b/dll/win32/usp10/shaping.c
@@ -2,7 +2,9 @@
 /* generated from http://www.unicode.org/Public/10.0.0/ucd/ArabicShaping.txt */
 /* DO NOT EDIT!! */
 
-const unsigned short /* DECLSPEC_HIDDEN */ wine_shaping_table[2912] =
+#include "wine/unicode.h"
+
+const unsigned short DECLSPEC_HIDDEN wine_shaping_table[2912] =
 {
     /* level 1 offsets */
     0x0100, 0x0110, 0x0110, 0x0120, 0x0130, 0x0140, 0x0150, 0x0160,
@@ -373,7 +375,7 @@ const unsigned short /* DECLSPEC_HIDDEN */ wine_shaping_table[2912] =
     0x0000, 0x0001, 0x0001, 0x0001, 0x0000, 0x0000, 0x0000, 0x0000
 };
 
-const unsigned short /* DECLSPEC_HIDDEN */ wine_shaping_forms[256][4] =
+const unsigned short DECLSPEC_HIDDEN wine_shaping_forms[256][4] =
 {
     { 0x0600, 0x0600, 0x0600, 0x0600 },
     { 0x0601, 0x0601, 0x0601, 0x0601 },
diff --git a/dll/win32/usp10/usp10.c b/dll/win32/usp10/usp10.c
index abc40fc891a..fe83722053b 100644
--- a/dll/win32/usp10/usp10.c
+++ b/dll/win32/usp10/usp10.c
@@ -24,11 +24,23 @@
  * and filtering characters and bi-directional text with custom line breaks.
  */
 
+#include <stdarg.h>
+#include <stdlib.h>
+#include <math.h>
+
+#include "windef.h"
+#include "winbase.h"
+#include "wingdi.h"
+#include "winuser.h"
+#include "winnls.h"
+#include "winreg.h"
+#include "usp10.h"
+
 #include "usp10_internal.h"
 
-#include <math.h>
-#include <winuser.h>
-#include <winreg.h>
+#include "wine/debug.h"
+#include "wine/heap.h"
+#include "wine/unicode.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(uniscribe);
 
@@ -1143,7 +1155,7 @@ HRESULT WINAPI ScriptGetProperties(const SCRIPT_PROPERTIES ***props, int *num)
 
     if (!props && !num) return E_INVALIDARG;
 
-    if (num) *num = sizeof(script_props)/sizeof(script_props[0]);
+    if (num) *num = ARRAY_SIZE(script_props);
     if (props) *props = script_props;
 
     return S_OK;
@@ -3597,14 +3609,13 @@ HRESULT WINAPI ScriptTextOut(const HDC hdc, SCRIPT_CACHE *psc, int x, int y, UIN
     if  (!psa->fNoGlyphIndex)                                     /* Have Glyphs?                      */
         fuOptions |= ETO_GLYPH_INDEX;                             /* Say don't do translation to glyph */
 
-    lpDx = heap_alloc(cGlyphs * sizeof(INT) * 2);
-    if (!lpDx) return E_OUTOFMEMORY;
+    if (!(lpDx = heap_calloc(cGlyphs, 2 * sizeof(*lpDx))))
+        return E_OUTOFMEMORY;
     fuOptions |= ETO_PDY;
 
     if (psa->fRTL && psa->fLogicalOrder)
     {
-        reordered_glyphs = heap_alloc( cGlyphs * sizeof(WORD) );
-        if (!reordered_glyphs)
+        if (!(reordered_glyphs = heap_calloc(cGlyphs, sizeof(*reordered_glyphs))))
         {
             heap_free( lpDx );
             return E_OUTOFMEMORY;
@@ -3743,8 +3754,7 @@ HRESULT WINAPI ScriptLayout(int runs, const BYTE *level, int *vistolog, int *log
     if (!level || (!vistolog && !logtovis))
         return E_INVALIDARG;
 
-    indexs = heap_alloc(sizeof(int) * runs);
-    if (!indexs)
+    if (!(indexs = heap_calloc(runs, sizeof(*indexs))))
         return E_OUTOFMEMORY;
 
     if (vistolog)
diff --git a/dll/win32/usp10/usp10_internal.h b/dll/win32/usp10/usp10_internal.h
index c0e28d542c0..22295132bb2 100644
--- a/dll/win32/usp10/usp10_internal.h
+++ b/dll/win32/usp10/usp10_internal.h
@@ -19,25 +19,9 @@
  *
  */
 
-#ifndef _USP10_INTERNAL_H_
-#define _USP10_INTERNAL_H_
+#pragma once
 
-#include <config.h>
-
-#include <stdarg.h>
-
-#define WIN32_NO_STATUS
-#define _INC_WINDOWS
-#define COM_NO_WINDOWS_H
-
-#include <windef.h>
-#include <winbase.h>
-#include <wingdi.h>
-#include <usp10.h>
-
-#include <wine/debug.h>
-#include <wine/unicode.h>
-#include <wine/list.h>
+#include "wine/list.h"
 
 #define MS_MAKE_TAG( _x1, _x2, _x3, _x4 ) \
           ( ( (ULONG)_x4 << 24 ) |     \
@@ -237,21 +221,6 @@ typedef struct {
 
 enum {lex_Halant, lex_Composed_Vowel, lex_Matra_post, lex_Matra_pre, lex_Matra_above, lex_Matra_below, lex_ZWJ, lex_ZWNJ, lex_NBSP, lex_Modifier, lex_Vowel, lex_Consonant, lex_Generic, lex_Ra, lex_Vedic, lex_Anudatta, lex_Nukta};
 
-static inline void * __WINE_ALLOC_SIZE(1) heap_alloc(size_t size)
-{
-    return HeapAlloc(GetProcessHeap(), 0, size);
-}
-
-static inline void * __WINE_ALLOC_SIZE(1) heap_alloc_zero(size_t size)
-{
-    return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
-}
-
-static inline BOOL heap_free(void *mem)
-{
-    return HeapFree(GetProcessHeap(), 0, mem);
-}
-
 static inline BOOL is_consonant( int type )
 {
     return (type == lex_Ra || type == lex_Consonant);
@@ -307,5 +276,3 @@ unsigned int OpenType_apply_GPOS_lookup(const ScriptCache *psc, const OUTLINETEX
 HRESULT OpenType_GetFontScriptTags(ScriptCache *psc, OPENTYPE_TAG searchingFor, int cMaxTags, OPENTYPE_TAG *pScriptTags, int *pcTags) DECLSPEC_HIDDEN;
 HRESULT OpenType_GetFontLanguageTags(ScriptCache *psc, OPENTYPE_TAG script_tag, OPENTYPE_TAG searchingFor, int cMaxTags, OPENTYPE_TAG *pLanguageTags, int *pcTags) DECLSPEC_HIDDEN;
 HRESULT OpenType_GetFontFeatureTags(ScriptCache *psc, OPENTYPE_TAG script_tag, OPENTYPE_TAG language_tag, BOOL filtered, OPENTYPE_TAG searchingFor, char tableType, int cMaxTags, OPENTYPE_TAG *pFeatureTags, int *pcTags, LoadedFeature** feature) DECLSPEC_HIDDEN;
-
-#endif /* _USP10_INTERNAL_H_ */
diff --git a/media/doc/README.WINE b/media/doc/README.WINE
index 48f62c6a60f..d9e9e13644b 100644
--- a/media/doc/README.WINE
+++ b/media/doc/README.WINE
@@ -189,7 +189,7 @@ reactos/dll/win32/twain_32            # Synced to WineStaging-3.3
 reactos/dll/win32/updspapi            # Synced to WineStaging-3.3
 reactos/dll/win32/url                 # Synced to WineStaging-3.3
 reactos/dll/win32/urlmon              # Synced to WineStaging-3.3
-reactos/dll/win32/usp10               # Synced to Wine-3.0
+reactos/dll/win32/usp10               # Synced to WineStaging-3.3
 reactos/dll/win32/uxtheme             # Forked
 reactos/dll/win32/vbscript            # Synced to Wine-3.0
 reactos/dll/win32/version             # Synced to Wine-3.0