diff --git a/Source/cmAddDefinitionsCommand.h b/Source/cmAddDefinitionsCommand.h
index 6705d116ec..ff2c4a038e 100644
--- a/Source/cmAddDefinitionsCommand.h
+++ b/Source/cmAddDefinitionsCommand.h
@@ -73,8 +73,6 @@ public:
     }
 
   cmTypeMacro(cmAddDefinitionsCommand, cmCommand);
-private:
-  bool ParseDefinition(std::string const& def);
 };