diff --git a/ui/gtk.c b/ui/gtk.c
index 63f6081..e314dba 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -1435,7 +1435,7 @@
     .dpy_cursor_define = gd_cursor_define,
 };
 
-void gtk_display_init(DisplayState *ds)
+void gtk_display_init(DisplayState *ds, bool full_screen)
 {
     GtkDisplayState *s = g_malloc0(sizeof(*s));
     char *filename;
@@ -1511,6 +1511,10 @@
 
     gtk_widget_show_all(s->window);
 
+    if (full_screen) {
+        gtk_menu_item_activate(GTK_MENU_ITEM(s->full_screen_item));
+    }
+
     register_displaychangelistener(&s->dcl);
 
     global_state = s;