diff --git a/herbstluftwm/usr/bin/hrunorraise b/herbstluftwm/usr/bin/hrunorraise
index 6e91aa6..b4f8a9a 100755
--- a/herbstluftwm/usr/bin/hrunorraise
+++ b/herbstluftwm/usr/bin/hrunorraise
@@ -3,7 +3,7 @@
 !#
 
 (define client-regexp
-  (rx "  " (submatch "0x" (= 7 hex))))
+  (rx "  " (submatch "0x" (** 6 7 hex))))
 
 (define current-client
   (run/string (herbstclient -n attr clients.focus.winid)))