diff --git a/xorg/50-systemd-user.sh b/xorg/50-systemd-user.sh
index 4d49767228..5588185c50 100755
--- a/xorg/50-systemd-user.sh
+++ b/xorg/50-systemd-user.sh
@@ -2,6 +2,6 @@
 
 systemctl --user import-environment DISPLAY XAUTHORITY
 
-if which dbus-update-activation-environment >/dev/null 2>&1; then
+if command -v dbus-update-activation-environment >/dev/null 2>&1; then
         dbus-update-activation-environment DISPLAY XAUTHORITY
 fi