diff --git a/dlls/user32/clipboard.c b/dlls/user32/clipboard.c
index 62a17f5d021..ffeb03d4435 100644
--- a/dlls/user32/clipboard.c
+++ b/dlls/user32/clipboard.c
@@ -750,25 +750,6 @@ BOOL WINAPI EmptyClipboard(void)
 }
 
 
-/**************************************************************************
- *		GetOpenClipboardWindow (USER32.@)
- */
-HWND WINAPI GetOpenClipboardWindow(void)
-{
-    HWND hWndOpen = 0;
-
-    SERVER_START_REQ( get_clipboard_info )
-    {
-        if (!wine_server_call_err( req )) hWndOpen = wine_server_ptr_handle( reply->window );
-    }
-    SERVER_END_REQ;
-
-    TRACE( "returning %p\n", hWndOpen );
-
-    return hWndOpen;
-}
-
-
 /**************************************************************************
  *		SetClipboardViewer (USER32.@)
  */
diff --git a/dlls/user32/user32.spec b/dlls/user32/user32.spec
index 99e1157227c..ffab0fca4d4 100644
--- a/dlls/user32/user32.spec
+++ b/dlls/user32/user32.spec
@@ -353,7 +353,7 @@
 @ stdcall GetNextDlgGroupItem(long long long)
 @ stdcall GetNextDlgTabItem(long long long)
 # @ stub GetNextQueueWindow
-@ stdcall GetOpenClipboardWindow()
+@ stdcall GetOpenClipboardWindow() NtUserGetOpenClipboardWindow
 @ stdcall GetParent(long)
 @ stdcall GetPhysicalCursorPos(ptr)
 @ stdcall GetPointerDevices(ptr ptr)
diff --git a/dlls/win32u/clipboard.c b/dlls/win32u/clipboard.c
index 7acab5de631..dca01708803 100644
--- a/dlls/win32u/clipboard.c
+++ b/dlls/win32u/clipboard.c
@@ -222,6 +222,23 @@ HWND WINAPI NtUserGetClipboardViewer(void)
     return viewer;
 }
 
+/**************************************************************************
+ *	     NtUserGetOpenClipboardWindow    (win32u.@)
+ */
+HWND WINAPI NtUserGetOpenClipboardWindow(void)
+{
+    HWND window = 0;
+
+    SERVER_START_REQ( get_clipboard_info )
+    {
+        if (!wine_server_call_err( req )) window = wine_server_ptr_handle( reply->window );
+    }
+    SERVER_END_REQ;
+
+    TRACE( "returning %p\n", window );
+    return window;
+}
+
 /**************************************************************************
  *	     NtUserGetClipboardSequenceNumber    (win32u.@)
  */
diff --git a/dlls/win32u/syscall.c b/dlls/win32u/syscall.c
index b6419c08ea0..26471718e51 100644
--- a/dlls/win32u/syscall.c
+++ b/dlls/win32u/syscall.c
@@ -116,6 +116,7 @@ static void * const syscalls[] =
     NtUserGetKeyboardState,
     NtUserGetLayeredWindowAttributes,
     NtUserGetObjectInformation,
+    NtUserGetOpenClipboardWindow,
     NtUserGetProcessWindowStation,
     NtUserGetProp,
     NtUserGetThreadDesktop,
diff --git a/dlls/win32u/win32u.spec b/dlls/win32u/win32u.spec
index 1353924845c..2f4b36babe5 100644
--- a/dlls/win32u/win32u.spec
+++ b/dlls/win32u/win32u.spec
@@ -959,7 +959,7 @@
 @ stub NtUserGetMouseMovePointsEx
 @ stdcall -syscall NtUserGetObjectInformation(long long long long ptr)
 @ stub NtUserGetOemBitmapSize
-@ stub NtUserGetOpenClipboardWindow
+@ stdcall -syscall NtUserGetOpenClipboardWindow()
 @ stub NtUserGetOwnerTransformedMonitorRect
 @ stub NtUserGetPhysicalDeviceRect
 @ stub NtUserGetPointerCursorId
diff --git a/dlls/wow64win/syscall.h b/dlls/wow64win/syscall.h
index 09a281b5d14..d97563427ce 100644
--- a/dlls/wow64win/syscall.h
+++ b/dlls/wow64win/syscall.h
@@ -102,6 +102,7 @@
     SYSCALL_ENTRY( NtUserGetKeyboardState ) \
     SYSCALL_ENTRY( NtUserGetLayeredWindowAttributes ) \
     SYSCALL_ENTRY( NtUserGetObjectInformation ) \
+    SYSCALL_ENTRY( NtUserGetOpenClipboardWindow ) \
     SYSCALL_ENTRY( NtUserGetProcessWindowStation ) \
     SYSCALL_ENTRY( NtUserGetProp ) \
     SYSCALL_ENTRY( NtUserGetThreadDesktop ) \
diff --git a/dlls/wow64win/user.c b/dlls/wow64win/user.c
index 4c47b8937cf..39f54ae82ba 100644
--- a/dlls/wow64win/user.c
+++ b/dlls/wow64win/user.c
@@ -205,6 +205,11 @@ NTSTATUS WINAPI wow64_NtUserGetClipboardOwner( UINT *args )
     return HandleToUlong( NtUserGetClipboardOwner() );
 }
 
+NTSTATUS WINAPI wow64_NtUserGetOpenClipboardWindow( UINT *args )
+{
+    return HandleToUlong( NtUserGetOpenClipboardWindow() );
+}
+
 NTSTATUS WINAPI wow64_NtUserGetClipboardSequenceNumber( UINT *args )
 {
     return NtUserGetClipboardSequenceNumber();
diff --git a/include/ntuser.h b/include/ntuser.h
index d06a0aee429..536e78dfda5 100644
--- a/include/ntuser.h
+++ b/include/ntuser.h
@@ -74,6 +74,7 @@ BOOL    WINAPI NtUserGetKeyboardState( BYTE *state );
 BOOL    WINAPI NtUserGetLayeredWindowAttributes( HWND hwnd, COLORREF *key, BYTE *alpha, DWORD *flags );
 BOOL    WINAPI NtUserGetObjectInformation( HANDLE handle, INT index, void *info,
                                            DWORD len, DWORD *needed );
+HWND    WINAPI NtUserGetOpenClipboardWindow(void);
 INT     WINAPI NtUserGetPriorityClipboardFormat( UINT *list, INT count );
 HWINSTA WINAPI NtUserGetProcessWindowStation(void);
 HANDLE  WINAPI NtUserGetProp( HWND hwnd, const WCHAR *str );