diff --git a/win32ss/gdi/gdi32/include/gdi32p.h b/win32ss/gdi/gdi32/include/gdi32p.h
index 3574850683..88da573ace 100644
--- a/win32ss/gdi/gdi32/include/gdi32p.h
+++ b/win32ss/gdi/gdi32/include/gdi32p.h
@@ -392,6 +392,9 @@ GdiAllocBatchCommand(
     /* Check if we have a valid environment */
     if (!pTeb || !pTeb->Win32ThreadInfo) return NULL;
 
+    /* This is not supported yet. */
+    if (Cmd == GdiBCExtSelClipRgn) return NULL;
+
     /* Do we use a DC? */
     if (hdc)
     {