diff --git a/gdk/mir/gdkmirscreen.c b/gdk/mir/gdkmirscreen.c
index 82f1ae68b6..2b53cef76e 100644
--- a/gdk/mir/gdkmirscreen.c
+++ b/gdk/mir/gdkmirscreen.c
@@ -383,7 +383,10 @@ gdk_mir_screen_get_monitor_geometry (GdkScreen    *screen,
     }
   else
     {
-      *dest = {0, 0, 0, 0};
+      dest->x = 0;
+      dest->y = 0;
+      dest->width = 0;
+      dest->height = 0;
     }
 }