diff --git a/core/os/main_loop.cpp b/core/os/main_loop.cpp
index b146d370f1d..8b4449586ba 100644
--- a/core/os/main_loop.cpp
+++ b/core/os/main_loop.cpp
@@ -52,6 +52,7 @@ void MainLoop::_bind_methods() {
 	BIND_CONSTANT(NOTIFICATION_WM_FOCUS_IN);
 	BIND_CONSTANT(NOTIFICATION_WM_FOCUS_OUT);
 	BIND_CONSTANT(NOTIFICATION_WM_QUIT_REQUEST);
+	BIND_CONSTANT(NOTIFICATION_WM_GO_BACK_REQUEST);
 	BIND_CONSTANT(NOTIFICATION_WM_UNFOCUS_REQUEST);
 	BIND_CONSTANT(NOTIFICATION_OS_MEMORY_WARNING);
 	BIND_CONSTANT(NOTIFICATION_TRANSLATION_CHANGED);