diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index bd26b5fca..201fceb07 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx
@@ -905,6 +905,8 @@ void cmGlobalGenerator::Generate()
     }
 
   this->CMakeInstance->UpdateProgress("Generating done", -1);
+
+  this->CMakeInstance->RunCheckForUnusedVariables("generation");
 }
 
 //----------------------------------------------------------------------------