diff --git a/Source/cmaketest.cxx b/Source/cmaketest.cxx
index 3af751e14..69eba7481 100644
--- a/Source/cmaketest.cxx
+++ b/Source/cmaketest.cxx
@@ -32,7 +32,7 @@ struct CleanUp
     {
       cmMakefileGenerator::UnRegisterGenerators();
     }
-  UseIt() 
+  void UseIt() 
     {
     }
 };