diff --git a/Samples/multimedia/directshow/baseclasses/wxdebug.cpp b/Samples/multimedia/directshow/baseclasses/wxdebug.cpp
index 5763891..6efa736 100644
--- a/Samples/multimedia/directshow/baseclasses/wxdebug.cpp
+++ b/Samples/multimedia/directshow/baseclasses/wxdebug.cpp
@@ -1234,7 +1234,7 @@
     hr = pUnk->QueryInterface(IID_IPin, (void **)&pp);
     if(SUCCEEDED(hr))
     {
-        CDisp::CDisp(static_cast<IPin*>(pp));
+        CDisp dummy(static_cast<IPin*>(pp));
         pp->Release();
         return;
     }