diff --git a/app/app.c b/app/app.c
index 29be46f..46e1ee7 100644
--- a/app/app.c
+++ b/app/app.c
@@ -1755,7 +1755,11 @@ static void ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 
 	bool lowBatPopup = gLowBattery && !gLowBatteryConfirmed &&  gScreenToDisplay == DISPLAY_MAIN;
 
+#ifdef ENABLE_FEAT_F4HWN // Disable PTT if KEY_LOCK
+	if ((gEeprom.KEY_LOCK || lowBatPopup) && gCurrentFunction != FUNCTION_TRANSMIT)
+#else
 	if ((gEeprom.KEY_LOCK || lowBatPopup) && gCurrentFunction != FUNCTION_TRANSMIT && Key != KEY_PTT)
+#endif
 	{	// keyboard is locked or low battery popup
 
 		// close low battery popup