diff --git a/reactos/include/ascii.h b/reactos/include/ascii.h
index b801316ec62..50b0dc8b553 100644
--- a/reactos/include/ascii.h
+++ b/reactos/include/ascii.h
@@ -2200,7 +2200,7 @@ VerFindFileA(
 LONG
 STDCALL
 RegConnectRegistryA (
-    LPSTR lpMachineName,
+    LPCSTR lpMachineName,
     HKEY hKey,
     PHKEY phkResult
     );
@@ -2342,7 +2342,7 @@ LONG
 STDCALL
 RegQueryValueExA (
     HKEY hKey,
-    LPSTR lpValueName,
+    LPCSTR lpValueName,
     LPDWORD lpReserved,
     LPDWORD lpType,
     LPBYTE lpData,
diff --git a/reactos/include/structs.h b/reactos/include/structs.h
index 7f7587cc90e..56e0947f615 100644
--- a/reactos/include/structs.h
+++ b/reactos/include/structs.h
@@ -44,7 +44,7 @@
 #include <ntos/ps.h>
 #include <ntos/disk.h>
 #include <ntos/gditypes.h>
-
+/*
 typedef struct _VALENT
 {
    LPTSTR ve_valuename;
@@ -52,6 +52,28 @@ typedef struct _VALENT
    DWORD ve_valueptr;
    DWORD ve_type;
 } VALENT, *PVALENT;
+ */
+typedef struct _VALENT_A {
+   LPSTR ve_valuename;
+   DWORD ve_valuelen;
+   DWORD ve_valueptr;
+   DWORD ve_type;
+} VALENTA, *PVALENTA;
+
+typedef struct _VALENT_W {
+   LPWSTR ve_valuename;
+   DWORD  ve_valuelen;
+   DWORD  ve_valueptr;
+   DWORD  ve_type;
+} VALENTW, *PVALENTW;
+
+#ifdef UNICODE
+typedef VALENTW VALENT;
+typedef PVALENTW PVALENT;
+#else
+typedef VALENTA VALENT;
+typedef PVALENTA PVALENT;
+#endif
 
 #ifndef WIN32_LEAN_AND_MEAN
 
diff --git a/reactos/include/unicode.h b/reactos/include/unicode.h
index c3b1fb8f251..2c9294150c7 100644
--- a/reactos/include/unicode.h
+++ b/reactos/include/unicode.h
@@ -2293,7 +2293,7 @@ LONG
 STDCALL
 RegQueryMultipleValuesW (
     HKEY hKey,
-    PVALENT val_list,
+    PVALENTW val_list,
     DWORD num_vals,
     LPWSTR lpValueBuf,
     LPDWORD ldwTotsize
@@ -2303,7 +2303,7 @@ LONG
 STDCALL
 RegQueryValueExW (
     HKEY hKey,
-    LPWSTR lpValueName,
+    LPCWSTR lpValueName,
     LPDWORD lpReserved,
     LPDWORD lpType,
     LPBYTE lpData,
@@ -2322,7 +2322,7 @@ RegReplaceKeyW (
 LONG
 STDCALL
 RegConnectRegistryW (
-    LPWSTR lpMachineName,
+    LPCWSTR lpMachineName,
     HKEY hKey,
     PHKEY phkResult
     );