diff --git a/lib/nodejs/lib/thrift/json_protocol.js b/lib/nodejs/lib/thrift/json_protocol.js
index e98650c..18fb012 100644
--- a/lib/nodejs/lib/thrift/json_protocol.js
+++ b/lib/nodejs/lib/thrift/json_protocol.js
@@ -418,7 +418,8 @@
   }
 
   if (openBracketCount !== 0) {
-    throw new Error("Malformed JSON input, mismatched backets");
+    // Missing closing bracket. Can be buffer underrun.
+    throw new InputBufferUnderrunError();
   }
 
   //Reconstitute the JSON object and conume the necessary bytes