* src/xfns.c (x_set_alpha_background): Don't call
gtk_widget_set_app_paintable without GTK.
{
gui_set_alpha_background (f, arg, oldval);
+#ifdef USE_GTK
/* This prevents GTK from painting the window's background, which
interferes with transparent background in some environments */
gtk_widget_set_app_paintable (FRAME_GTK_OUTER_WIDGET (f),
f->alpha_background != 1.0);
+#endif
if (f->alpha_background != 1.0)
{