diff --git a/js/stm32.js b/js/stm32.js
index c66197b8..4d8a4886 100644
--- a/js/stm32.js
+++ b/js/stm32.js
@@ -1,5 +1,5 @@
 var STM32_protocol = function() {
-    this.hex; // hex object
+    this.hex; // ref
     
     this.receive_buffer;
     
@@ -52,8 +52,9 @@ STM32_protocol.prototype.GUI_status = function(string) {
 };
 
 // no input parameters
-STM32_protocol.prototype.connect = function() {
+STM32_protocol.prototype.connect = function(hex) {
     var self = this;
+    self.hex = hex;
     
     var selected_port = String($('div#port-picker .port select').val());
     var baud = parseInt($('div#port-picker #baud').val());
diff --git a/tabs/firmware_flasher.js b/tabs/firmware_flasher.js
index 96366772..338402f2 100644
--- a/tabs/firmware_flasher.js
+++ b/tabs/firmware_flasher.js
@@ -83,10 +83,8 @@ function tab_initialize_firmware_flasher() {
         $('a.flash_firmware').click(function() {
             if (!$(this).hasClass('locked')) {
                 if (!GUI.connect_lock) { // button disabled while flashing is in progress
-                    if (parsed_hex != false) {
-                        STM32.hex = parsed_hex;
-                        
-                        STM32.connect();
+                    if (parsed_hex != false) {                        
+                        STM32.connect(parsed_hex);
                     } else {
                         STM32.GUI_status('<span style="color: red">Firmware not loaded</span>');
                     }