diff --git a/rcodes.js b/rcodes.js
index 4ca9db6..492b2f3 100644
--- a/rcodes.js
+++ b/rcodes.js
@@ -22,7 +22,7 @@ exports.toString = function (rcode) {
     case 14: return 'RCODE_14'
     case 15: return 'RCODE_15'
   }
-  return 'RCODE_' + type
+  return 'RCODE_' + rcode
 }
 
 exports.toRcode = function (code) {
@@ -45,4 +45,4 @@ exports.toRcode = function (code) {
     case 'RCODE_15': return 15
   }
   return 0
-}
\ No newline at end of file
+}