diff --git a/Source/CTest/cmCTestTestCommand.h b/Source/CTest/cmCTestTestCommand.h
index d68de9f8a..647896d35 100644
--- a/Source/CTest/cmCTestTestCommand.h
+++ b/Source/CTest/cmCTestTestCommand.h
@@ -70,7 +70,7 @@ public:
   cmTypeMacro(cmCTestTestCommand, cmCTestHandlerCommand);
 
 protected:
-  cmCTestGenericHandler* InitializeActualHandler();
+  virtual cmCTestGenericHandler* InitializeActualHandler();
   cmCTestGenericHandler* InitializeHandler();
 
   enum {