diff --git a/ArduCopterMega/system.pde b/ArduCopterMega/system.pde
index 348d048068..0a52c8a4ce 100644
--- a/ArduCopterMega/system.pde
+++ b/ArduCopterMega/system.pde
@@ -41,7 +41,7 @@ const struct Menu::command main_menu_commands[] PROGMEM = {
 };
 
 // Create the top-level menu object.
-MENU(main_menu, "AC 2.0.39 Beta", main_menu_commands);
+MENU(main_menu, "AC 2.0.39b Beta", main_menu_commands);
 
 #endif // CLI_ENABLED