Index: src/chext/chext.cpp
===================================================================
diff -u -N -r3d1de44762647618faf9b5b3a87f89b293899d8d -r4572f6cddf7dab06b1de99504a6bbd3680d11e6d
--- src/chext/chext.cpp	(.../chext.cpp)	(revision 3d1de44762647618faf9b5b3a87f89b293899d8d)
+++ src/chext/chext.cpp	(.../chext.cpp)	(revision 4572f6cddf7dab06b1de99504a6bbd3680d11e6d)
@@ -123,7 +123,14 @@
 	else
 		hr = DllUnregisterServer();
 
-	BOOST_LOG_HRESULT(rLogger, hr) << LOG_PARAMS2(bInstall, pszCmdLine);
+	if(pszCmdLine)
+	{
+		BOOST_LOG_HRESULT(rLogger, hr) << LOG_PARAMS2(bInstall, pszCmdLine);
+	}
+	else
+	{
+		BOOST_LOG_HRESULT(rLogger, hr) << LOG_PARAM(bInstall);
+	}
 
 	return hr;
 }