diff --git a/Source/cmAddCustomTargetCommand.cxx b/Source/cmAddCustomTargetCommand.cxx
index 9a3b4b396..94854b1ab 100644
--- a/Source/cmAddCustomTargetCommand.cxx
+++ b/Source/cmAddCustomTargetCommand.cxx
@@ -19,7 +19,7 @@
 // cmAddCustomTargetCommand
 bool cmAddCustomTargetCommand
 ::InitialPass(std::vector<std::string> const& args,
-              cmExecutionStatus& status)
+              cmExecutionStatus&)
 {
   if(args.size() < 1 )
     {