diff --git a/lib/call.js b/lib/call.js
index bd797a6..1377b11 100644
--- a/lib/call.js
+++ b/lib/call.js
@@ -333,7 +333,7 @@ Call.prototype.__clear = function() {
 Call.prototype.__buffer = function() {
   if (!this._buffer && !this.request) {
     this._buffer = new ReplayBuffer();
-    return true;
   }
-  return false;
+
+  return this._buffer ? true : false;
 };