diff --git a/source/build/pidl/header.pm b/source/build/pidl/header.pm
index 8676c090425..34707f86722 100644
--- a/source/build/pidl/header.pm
+++ b/source/build/pidl/header.pm
@@ -123,7 +123,7 @@ sub DumpInterface($)
 sub Dump($)
 {
     my($idl) = shift;
-    $res = "/* Dumped by pidl */\n\n";
+    $res = "/* header auto-generated by pidl */\n\n";
     foreach my $x (@{$idl}) {
 	($x->{TYPE} eq "INTERFACE") && 
 	    DumpInterface($x);