diff --git a/xCAT-server/lib/xcat/plugins/osdistro.pm b/xCAT-server/lib/xcat/plugins/osdistro.pm
index 835c93fe7..beccf7f47 100644
--- a/xCAT-server/lib/xcat/plugins/osdistro.pm
+++ b/xCAT-server/lib/xcat/plugins/osdistro.pm
@@ -95,6 +95,7 @@ sub getOSdistroref
 	{
 		return undef;
 	}
+        # verified this does work on DB2
 
 	my @clause=();