diff --git a/server/queue.c b/server/queue.c
index 2cab814..4e0332b 100644
--- a/server/queue.c
+++ b/server/queue.c
@@ -833,7 +833,7 @@
     {
         /* check against the filters */
         if (msg->msg == WM_QUIT) break;  /* WM_QUIT is never filtered */
-        if (win && msg->win && msg->win != win) continue;
+        if (win && msg->win && msg->win != win && !is_child_window( win, msg->win )) continue;
         if (msg->msg < first) continue;
         if (msg->msg > last) continue;
         break; /* found one */