diff --git a/dlls/user.exe16/user_private.h b/dlls/user.exe16/user_private.h
index 336b89102d4..afd75f0b096 100644
--- a/dlls/user.exe16/user_private.h
+++ b/dlls/user.exe16/user_private.h
@@ -24,8 +24,7 @@
 #include <stdarg.h>
 #include "windef.h"
 #include "winbase.h"
-#include "wingdi.h"
-#include "winuser.h"
+#include "ntuser.h"
 #include "winreg.h"
 #include "winternl.h"
 #include "wine/windef16.h"
diff --git a/dlls/user.exe16/window.c b/dlls/user.exe16/window.c
index 5a9448a2131..01d1b101c92 100644
--- a/dlls/user.exe16/window.c
+++ b/dlls/user.exe16/window.c
@@ -23,7 +23,6 @@
 #include "user_private.h"
 #include "wine/list.h"
 #include "wine/server.h"
-#include "wine/gdi_driver.h"
 #include "wine/debug.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(win);
@@ -676,7 +675,7 @@ HDC16 WINAPI GetWindowDC16( HWND16 hwnd )
 INT16 WINAPI ReleaseDC16( HWND16 hwnd, HDC16 hdc )
 {
     INT16 ret = (INT16)ReleaseDC( WIN_Handle32(hwnd), HDC_32(hdc) );
-    SetHookFlags( HDC_32(hdc), DCHF_ENABLEDC );
+    NtUserCallOneParam( HandleToUlong( HDC_32(hdc) ), NtUserEnableDC );
     return ret;
 }
 
diff --git a/dlls/win32u/gdiobj.c b/dlls/win32u/gdiobj.c
index 888313ad685..208ebb1da5e 100644
--- a/dlls/win32u/gdiobj.c
+++ b/dlls/win32u/gdiobj.c
@@ -1216,7 +1216,6 @@ static struct unix_funcs unix_funcs =
     NtUserWindowFromPoint,
 
     SetDIBits,
-    SetHookFlags,
     __wine_get_brush_bitmap_info,
     __wine_get_file_outline_text_metric,
     __wine_get_icm_profile,
diff --git a/dlls/win32u/sysparams.c b/dlls/win32u/sysparams.c
index 7908dc62716..cb16237d9f1 100644
--- a/dlls/win32u/sysparams.c
+++ b/dlls/win32u/sysparams.c
@@ -4635,6 +4635,8 @@ ULONG_PTR WINAPI NtUserCallOneParam( ULONG_PTR arg, ULONG code )
         return HandleToUlong( begin_defer_window_pos( arg ));
     case NtUserCreateCursorIcon:
         return HandleToUlong( alloc_cursoricon_handle( arg ));
+    case NtUserEnableDC:
+        return SetHookFlags( UlongToHandle(arg), DCHF_ENABLEDC );
     case NtUserGetClipCursor:
         return get_clip_cursor( (RECT *)arg );
     case NtUserGetCursorPos:
diff --git a/dlls/win32u/win32u.spec b/dlls/win32u/win32u.spec
index fc659c4ca9f..e37907e7399 100644
--- a/dlls/win32u/win32u.spec
+++ b/dlls/win32u/win32u.spec
@@ -1321,7 +1321,6 @@
 # Wine internal extensions
 
 # user32
-@ stdcall SetHookFlags(long long)
 @ cdecl __wine_set_visible_region(long long ptr ptr ptr)
 
 # Graphics drivers
diff --git a/dlls/win32u/win32u_private.h b/dlls/win32u/win32u_private.h
index 3f9183a2b1d..ac40daa5d35 100644
--- a/dlls/win32u/win32u_private.h
+++ b/dlls/win32u/win32u_private.h
@@ -273,7 +273,6 @@ struct unix_funcs
     INT (WINAPI *pSetDIBits)( HDC hdc, HBITMAP hbitmap, UINT startscan,
                               UINT lines, const void *bits, const BITMAPINFO *info,
                               UINT coloruse );
-    WORD (WINAPI *pSetHookFlags)( HDC hdc, WORD flags );
     BOOL (CDECL *get_brush_bitmap_info)( HBRUSH handle, BITMAPINFO *info, void *bits, UINT *usage );
     BOOL (CDECL *get_file_outline_text_metric)( const WCHAR *path, OUTLINETEXTMETRICW *otm );
     BOOL (CDECL *get_icm_profile)( HDC hdc, BOOL allow_default, DWORD *size, WCHAR *filename );
diff --git a/dlls/win32u/wrappers.c b/dlls/win32u/wrappers.c
index 471bfa449b1..9665c8106c4 100644
--- a/dlls/win32u/wrappers.c
+++ b/dlls/win32u/wrappers.c
@@ -1112,12 +1112,6 @@ INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
     return unix_funcs->pSetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
 }
 
-WORD WINAPI SetHookFlags( HDC hdc, WORD flags )
-{
-    if (!unix_funcs) return 0;
-    return unix_funcs->pSetHookFlags( hdc, flags );
-}
-
 BOOL CDECL __wine_get_icm_profile( HDC hdc, BOOL allow_default, DWORD *size, WCHAR *filename )
 {
     if (!unix_funcs) return FALSE;
diff --git a/include/ntuser.h b/include/ntuser.h
index a4e28764e0d..f68f5481f90 100644
--- a/include/ntuser.h
+++ b/include/ntuser.h
@@ -99,6 +99,7 @@ enum
 {
     NtUserBeginDeferWindowPos,
     NtUserCreateCursorIcon,
+    NtUserEnableDC,
     NtUserGetClipCursor,
     NtUserGetCursorPos,
     NtUserGetIconParam,