diff --git a/app/HGProductionTool/dialog_inputserialnum.cpp b/app/HGProductionTool/dialog_inputserialnum.cpp
index 3bd36db..8930c76 100644
--- a/app/HGProductionTool/dialog_inputserialnum.cpp
+++ b/app/HGProductionTool/dialog_inputserialnum.cpp
@@ -204,7 +204,7 @@ int Dialog_InputSerialNum::getSpeedMode()
 
     int speed = 0;
     QString devType = m_devType;
-    if (getDeviceFwVersion().mid(3, 1) == "Z"); //306
+    if (getDeviceFwVersion().mid(3, 1) == "Z") //306
     {
         devType = "G306";
     }