diff -r 29143d1fc6fa -r 6134af9ff32b indra/newview/llimview.cpp
--- a/indra/newview/llimview.cpp	Mon May 28 09:23:24 2012 -0400
+++ b/indra/newview/llimview.cpp	Thu Jun 21 22:18:51 2012 +0200
@@ -2458,8 +2458,16 @@
 		make_ui_sound("UISndNewIncomingIMSession");
 	}
 
-	bool skip_message = (gSavedSettings.getBOOL("VoiceCallsFriendsOnly") &&
-		LLAvatarTracker::instance().getBuddyInfo(other_participant_id) == NULL);
+	bool skip_message = false;
+	LLIMModel::LLIMSession* session = LLIMModel::instance().findIMSession(new_session_id);
+	if (session)
+	{
+		if (session->isAdHoc())
+		{
+			skip_message = (other_participant_id != gAgentID && gSavedSettings.getBOOL("VoiceCallsFriendsOnly") &&
+				LLAvatarTracker::instance().getBuddyInfo(other_participant_id) == NULL);
+		}
+	}	
 
 	if (!LLMuteList::getInstance()->isMuted(other_participant_id, LLMute::flagTextChat) && !skip_message)
 	{