diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index 81b4b3323..ac48b82ab 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -390,6 +390,7 @@ void cmMakefile::AddCommand(cmCommand* wg)
 {
   std::string name = wg->GetName();
   m_Commands.insert( RegisteredCommandsMap::value_type(name, wg));
+  this->AddDefinition(name.c_str(), true);
 }
 
   // Set the make file