diff --git a/lib/parse_websocket.js b/lib/parse_websocket.js
index d876b71..88de032 100644
--- a/lib/parse_websocket.js
+++ b/lib/parse_websocket.js
@@ -19,7 +19,7 @@ function parseWebSocketRequest (socket, params) {
   params.peer_id = common.binaryToHex(params.peer_id)
 
   if (params.answer) {
-    if (typeof params.to_peer_id !== 'string' || params.to_peer_id.length !== 20)) {
+    if (typeof params.to_peer_id !== 'string' || params.to_peer_id.length !== 20) {
       throw new Error('invalid `to_peer_id` (required with `answer`)')
     }
     params.to_peer_id = common.binaryToHex(params.to_peer_id)