--- source/nsswitch/idmap_ad.c.orig	2007-08-23 15:44:22.097859364 -0400
+++ source/nsswitch/idmap_ad.c	2007-08-23 15:45:23.023906036 -0400
@@ -753,7 +753,7 @@
        
 	if ( gid ) {		
 		if ( !ads_pull_uint32(ads, msg, ad_schema->posix_gidnumber_attr, gid ) )
-			*gid = 0;		
+			*gid = (uint32)-1;		
 	}
 		
 	return NT_STATUS_OK;