diff --git a/gdk/mir/gdkmireventsource.c b/gdk/mir/gdkmireventsource.c
index d2e3f2ee06..df2ec92a4a 100644
--- a/gdk/mir/gdkmireventsource.c
+++ b/gdk/mir/gdkmireventsource.c
@@ -52,6 +52,7 @@ send_event (GdkWindow *window, GdkDevice *device, GdkEvent *event)
   GList *node;
 
   gdk_event_set_device (event, device);
+  gdk_event_set_source_device (event, device);
   gdk_event_set_screen (event, gdk_display_get_screen (gdk_window_get_display (window), 0));
   event->any.window = g_object_ref (window);