diff --git a/root/etc/s6-overlay/s6-rc.d/svc-xrdp-sesman/run b/root/etc/s6-overlay/s6-rc.d/svc-xrdp-sesman/run
index ec37dee..b822021 100755
--- a/root/etc/s6-overlay/s6-rc.d/svc-xrdp-sesman/run
+++ b/root/etc/s6-overlay/s6-rc.d/svc-xrdp-sesman/run
@@ -4,6 +4,6 @@
 fdmove -c 2 1
 
 # Notify service manager when xrdp is up
-s6-notifyoncheck -w 500 -c "nc -z localhost 3350"
+s6-notifyoncheck -w 500 -c "test -S /var/run/xrdp/sesman.socket"
 
 /usr/sbin/xrdp-sesman --nodaemon