diff --git a/bricks/rtc.js b/bricks/rtc.js
index e3c5156..5dff566 100644
--- a/bricks/rtc.js
+++ b/bricks/rtc.js
@@ -262,7 +262,7 @@ bricks.RTCP2PConnect = class {
 	}
 	async send_offer(peer){
 		console.log('send_offer(), peers=', this.peers, 'peer=', peer);
-		pc = this.peers[peer.id].pc;
+		var pc = this.peers[peer.id].pc;
         var offer = await pc.createOffer();
         await pc.setLocalDescription(offer);
         var d = {