diff --git a/gdk/x11/gdkscreen-x11.c b/gdk/x11/gdkscreen-x11.c
index 82b8aa2132..063b597922 100644
--- a/gdk/x11/gdkscreen-x11.c
+++ b/gdk/x11/gdkscreen-x11.c
@@ -653,6 +653,9 @@ init_randr15 (GdkScreen *screen)
         XRRGetOutputInfo (x11_screen->xdisplay, resources, output);
       GdkX11Monitor monitor;
 
+      if (output_info == NULL)
+        continue;
+
       /* Non RandR1.2+ X driver have output name "default" */
       randr12_compat |= !g_strcmp0 (output_info->name, "default");