diff --git a/index.js b/index.js
index 01fbdfe..f987ab4 100644
--- a/index.js
+++ b/index.js
@@ -319,7 +319,7 @@ ModbusRTU.prototype.open = function(callback) {
                 }
             });
 
-            /* On serial port open OK call next function */
+            /* On serial port open OK call next function with no error */
             if (callback)
                 callback(error);
         }
diff --git a/package.json b/package.json
index c2b5102..0109dfc 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "modbus-serial",
-  "version": "5.2.14",
+  "version": "5.2.15",
   "description": "A pure JavaScript implemetation of MODBUS-RTU (Serial and TCP) for NodeJS.",
   "main": "index.js",
   "scripts": {