diff --git a/indra/llaudio/llaudioengine.cpp b/indra/llaudio/llaudioengine.cpp
index 2c4a57675e..5f87ac225d 100644
--- a/indra/llaudio/llaudioengine.cpp
+++ b/indra/llaudio/llaudioengine.cpp
@@ -411,7 +411,7 @@ void LLAudioEngine::idle()
 	for (source_map::value_type& src_pair : mAllSources)
 	{
 		LLAudioSource *sourcep = src_pair.second;
-		if (sourcep->isMuted() && sourcep->isSyncMaster() && sourcep->getPriority() > max_sm_priority)
+		if (!sourcep->isMuted() && sourcep->isSyncMaster() && sourcep->getPriority() > max_sm_priority)
 		{
 			sync_masterp = sourcep;
 			master_channelp = sync_masterp->getChannel();