diff --git a/Configure b/Configure
index a67a98ef1..22eb550ff 100755
--- a/Configure
+++ b/Configure
@@ -761,7 +761,7 @@ PROCESS_ARGS:
 			}
 		else
 			{
-			die "target already defined - $target\n" if ($target ne "");
+			die "target already defined - $target (offending arg: $_)\n" if ($target ne "");
 			$target=$_;
 			}