diff --git a/xCAT-server/lib/xcat/plugins/osdistro.pm b/xCAT-server/lib/xcat/plugins/osdistro.pm
index 835c93fe7..4fc2c3cbc 100644
--- a/xCAT-server/lib/xcat/plugins/osdistro.pm
+++ b/xCAT-server/lib/xcat/plugins/osdistro.pm
@@ -258,7 +258,7 @@ sub rmosdistro
 		#remove the osdistro entry			
                 $osdistrotab->delEntries(\%keyhash);
    		$osdistrotab->commit;
-        	$callback->({info=>"rmosdistro: remove $_ success",errorcode=>[0]});
+                $callback->({info=>["rmosdistro: remove $_ success"],errorcode=>[0]})
 				
 	}