diff --git a/util/test/demos/d3d11/d3d11_video_textures.cpp b/util/test/demos/d3d11/d3d11_video_textures.cpp
index 4f277e774..bf0c4fd04 100644
--- a/util/test/demos/d3d11/d3d11_video_textures.cpp
+++ b/util/test/demos/d3d11/d3d11_video_textures.cpp
@@ -840,6 +840,8 @@ float4 main(v2f IN) : SV_Target0
       Present();
     }
 
+    engine = NULL;
+
     if(dyn_MFShutdown)
       dyn_MFShutdown();