diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index 338144768..5c52a1a2d 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -212,7 +212,7 @@ void cmake::CleanupCommandsAndMacros()
       delete j->second;
       }
     }
-  this->Commands.erase(this->Commands.begin(), this->Commands.end());
+  this->Commands.clear();
   std::vector<cmCommand*>::iterator it;
   for ( it = commands.begin(); it != commands.end();
     ++ it )