diff --git a/deploy/packages/deb/debian/postrm b/deploy/packages/deb/debian/postrm
index affb2f4cc..5df55135a 100755
--- a/deploy/packages/deb/debian/postrm
+++ b/deploy/packages/deb/debian/postrm
@@ -56,7 +56,7 @@ case "$1" in
                 rm -r /usr/lib/emqx
         fi
 
-        if pidof systemd; then
+        if systemctl status --no-pager; then
           systemctl disable emqx;
           rm -f /etc/systemd/emqx.service
         fi