diff --git a/reactos/dll/win32/shell32/shell32.spec b/reactos/dll/win32/shell32/shell32.spec
index da323432f82..672ec81dd81 100644
--- a/reactos/dll/win32/shell32/shell32.spec
+++ b/reactos/dll/win32/shell32/shell32.spec
@@ -255,6 +255,7 @@
  660 stdcall -noname FileIconInit(long)
  680 stdcall IsUserAnAdmin()
  701 stdcall CDefFolderMenu_Create2(ptr ptr long ptr ptr ptr long ptr ptr)
+ 704 stdcall -noname GUIDFromStringW(wstr ptr)
  714 stdcall @(ptr) SHELL32_714 # PathIsTemporaryW
  730 stdcall RestartDialogEx(long wstr long long)
 
diff --git a/reactos/dll/win32/shell32/shellord.c b/reactos/dll/win32/shell32/shellord.c
index 458b8ff7c79..c1e48dc9696 100644
--- a/reactos/dll/win32/shell32/shellord.c
+++ b/reactos/dll/win32/shell32/shellord.c
@@ -33,6 +33,7 @@
 #include "winreg.h"
 #include "wine/debug.h"
 #include "winnls.h"
+#include "winternl.h"
 
 #include "shellapi.h"
 #include "objbase.h"
@@ -1575,6 +1576,17 @@ BOOL WINAPI shell32_243(DWORD a, DWORD b)
   return FALSE;
 }
 
+/*************************************************************************
+ *      GUIDFromStringW   [SHELL32.704]
+ */
+BOOL WINAPI GUIDFromStringW(LPCWSTR str, LPGUID guid)
+{
+    UNICODE_STRING guid_str;
+
+    RtlInitUnicodeString(&guid_str, str);
+    return !RtlGUIDFromString(&guid_str, guid);
+}
+
 /*************************************************************************
  *      @	[SHELL32.714]
  */