diff --git a/indra/newview/llimpanel.cpp b/indra/newview/llimpanel.cpp
index b1479ffe9..88d8467df 100644
--- a/indra/newview/llimpanel.cpp
+++ b/indra/newview/llimpanel.cpp
@@ -574,8 +574,8 @@ BOOL LLFloaterIMPanel::postBuild()
 		if (LLUICtrl* ctrl = findChild<LLUICtrl>("rp_mode"))
 			ctrl->setCommitCallback(boost::bind(&LLFloaterIMPanel::onRPMode, this, _2));
 
-		getChild<LLButton>("start_call_btn")->setCommitCallback(boost::bind(&LLIMMgr::startCall, gIMMgr, mOtherParticipantUUID, LLVoiceChannel::OUTGOING_CALL));
-		getChild<LLButton>("end_call_btn")->setCommitCallback(boost::bind(&LLIMMgr::endCall, gIMMgr, mOtherParticipantUUID));
+		getChild<LLButton>("start_call_btn")->setCommitCallback(boost::bind(&LLIMMgr::startCall, gIMMgr, mSessionUUID, LLVoiceChannel::OUTGOING_CALL));
+		getChild<LLButton>("end_call_btn")->setCommitCallback(boost::bind(&LLIMMgr::endCall, gIMMgr, mSessionUUID));
 		getChild<LLButton>("send_btn")->setCommitCallback(boost::bind(&LLFloaterIMPanel::onSendMsg,this));
 		if (LLButton* btn = findChild<LLButton>("toggle_active_speakers_btn"))
 			btn->setCommitCallback(boost::bind(&LLFloaterIMPanel::onClickToggleActiveSpeakers, this, _2));