diff --git a/reactos/subsystems/win32/win32k/ntuser/painting.c b/reactos/subsystems/win32/win32k/ntuser/painting.c
index 1b43e12d3cb..af0b4262f47 100644
--- a/reactos/subsystems/win32/win32k/ntuser/painting.c
+++ b/reactos/subsystems/win32/win32k/ntuser/painting.c
@@ -166,27 +166,34 @@ IntGetNCUpdateRgn(PWINDOW_OBJECT Window, BOOL Validate)
        Window->UpdateRegion != (HRGN)1)
    {
       hRgnNonClient = NtGdiCreateRectRgn(0, 0, 0, 0);
-      hRgnWindow = IntCalcWindowRgn(Window, TRUE);
 
       /*
        * If region creation fails it's safe to fallback to whole
        * window region.
        */
-
       if (hRgnNonClient == NULL)
       {
          return (HRGN)1;
       }
 
+      hRgnWindow = IntCalcWindowRgn(Window, TRUE);
+      if (hRgnWindow == NULL)
+      {
+         NtGdiDeleteObject(hRgnNonClient);
+         return (HRGN)1;
+      }
+
       RgnType = NtGdiCombineRgn(hRgnNonClient, Window->UpdateRegion,
                                 hRgnWindow, RGN_DIFF);
       if (RgnType == ERROR)
       {
+         NtGdiDeleteObject(hRgnWindow);
          NtGdiDeleteObject(hRgnNonClient);
          return (HRGN)1;
       }
       else if (RgnType == NULLREGION)
       {
+         NtGdiDeleteObject(hRgnWindow);
          NtGdiDeleteObject(hRgnNonClient);
          return NULL;
       }