Index: Slim/Player/Sync.pm
===================================================================
--- Slim/Player/Sync.pm	(revision 16044)
+++ Slim/Player/Sync.pm	(working copy)
@@ -333,7 +333,7 @@
 			if ($othermasterID && ($othermasterID eq $masterID)) {
 				$client->syncgroupid($masterID);
 				$other->syncgroupid($masterID);
-				sync($client, $other);
+				$other->execute( ['sync', $client->id() ] );
 				last;
 			}