diff --git a/src/terminal/widget.c b/src/terminal/widget.c
index b7138db..d18a3d6 100644
--- a/src/terminal/widget.c
+++ b/src/terminal/widget.c
@@ -816,8 +816,10 @@ gboolean v3270_focus_out_event(GtkWidget *widget, GdkEventFocus *event)
 
 	gtk_im_context_focus_out(terminal->input_method);
 
+#ifdef KEY_FLAG_ALT
     terminal->keyflags &= ~KEY_FLAG_ALT;
     v3270_draw_alt_status(terminal);
+#endif // KEY_FLAG_ALT
 
 	return notify_focus(widget,event);
 }
--
libgit2 0.21.2