diff --git a/ghc/driver/ghc-iface.lprl b/ghc/driver/ghc-iface.lprl
index b1fae527828d4bdc402f389c69422ce2fae1a40c..0fd3fb13f110a2ecb404ce65c1c0a9edcf0f6a4a 100644
--- a/ghc/driver/ghc-iface.lprl
+++ b/ghc/driver/ghc-iface.lprl
@@ -302,7 +302,7 @@ sub calcNewModuleVersion {
 	return(&mv_change($changed_version,"$v changed")) if $Decl{"old:$v"} ne $Decl{"new:$v"};
     }
     
-    print STDERR "Module version unchanged at $unchanged_version\n";
+    print STDERR "$Pgm: module version unchanged at $unchanged_version\n";
     return($unchanged_version);
 }