diff --git a/indra/newview/llchathistory.cpp b/indra/newview/llchathistory.cpp
index 5748eeec47f333abeff30ff48c8639452f2fce72..a9e8e77a0b12b6e25fea734dbd0c93bf363d0f88 100644
--- a/indra/newview/llchathistory.cpp
+++ b/indra/newview/llchathistory.cpp
@@ -452,11 +452,13 @@ class LLChatHistoryHeader: public LLPanel
 			if (gAgent.isInGroup(mSessionID))
 			{
 				LLIMSpeakerMgr* speaker_mgr = LLIMModel::getInstance()->getSpeakerManager(mSessionID);
-				const LLSpeaker * speakerp = speaker_mgr->findSpeaker(getAvatarId());
-
-				if (NULL != speakerp)
+				if(speaker_mgr)
 				{
-					return !speakerp->mModeratorMutedText;
+					const LLSpeaker * speakerp = speaker_mgr->findSpeaker(getAvatarId());
+					if (NULL != speakerp)
+					{
+						return !speakerp->mModeratorMutedText;
+					}
 				}
 			}
 			return false;