diff --git a/indra/newview/llimpanel.cpp b/indra/newview/llimpanel.cpp
index b65c62b00..c95658c18 100644
--- a/indra/newview/llimpanel.cpp
+++ b/indra/newview/llimpanel.cpp
@@ -405,6 +405,8 @@ void LLFloaterIMPanel::onAvatarNameLookup(const LLAvatarName& avatar_name)
 
 LLFloaterIMPanel::~LLFloaterIMPanel()
 {
+	LLAvatarTracker::instance().removeParticularFriendObserver(mOtherParticipantUUID, this);
+
 	delete mSpeakers;
 	mSpeakers = NULL;