diff --git a/js/msp.js b/js/msp.js
index 9a44afd8..92ad80e8 100644
--- a/js/msp.js
+++ b/js/msp.js
@@ -511,13 +511,13 @@ function send_message(code, data, callback_sent, callback_msp) {
     obj.timer = setInterval(function() {
         console.log('MSP data request timed-out: ' + code);
 
-        serial.send(bufferOut, function(writeInfo) {});
+        serial.send(bufferOut, function(sendInfo) {});
     }, 1000); // we should be able to define timeout in the future
 
     MSP.callbacks.push(obj);
 
-    serial.send(bufferOut, function(writeInfo) {
-        if (writeInfo.bytesSent > 0) {
+    serial.send(bufferOut, function(sendInfo) {
+        if (sendInfo.bytesSent > 0) {
             if (callback_sent) callback_sent();
         }
     });
diff --git a/js/serial.js b/js/serial.js
index e8d276a7..41e1f4ee 100644
--- a/js/serial.js
+++ b/js/serial.js
@@ -75,7 +75,7 @@ var serial = {
         if (!self.transmitting) {
             self.transmitting = true;
 
-            var sending = function() {
+            function sending() {
                 // store inside separate variables in case array gets destroyed
                 var data = self.output_buffer[0].data;
                 var callback = self.output_buffer[0].callback;