diff --git a/indra/newview/llimfloater.cpp b/indra/newview/llimfloater.cpp
index dee86f4a22..7bad949921 100644
--- a/indra/newview/llimfloater.cpp
+++ b/indra/newview/llimfloater.cpp
@@ -106,6 +106,8 @@ void LLIMFloater::onFocusReceived()
 // virtual
 void LLIMFloater::onClose(bool app_quitting)
 {
+	if (!gIMMgr->hasSession(mSessionID)) return;
+	
 	setTyping(false);
 	gIMMgr->leaveSession(mSessionID);
 }