diff --git a/meta-openembedded/meta-networking/recipes-daemons/ptpd/ptpd_2.3.1.bb b/meta-openembedded/meta-networking/recipes-daemons/ptpd/ptpd_2.3.1.bb
index 227c9f9..d1eb6e2 100644
--- a/meta-openembedded/meta-networking/recipes-daemons/ptpd/ptpd_2.3.1.bb
+++ b/meta-openembedded/meta-networking/recipes-daemons/ptpd/ptpd_2.3.1.bb
@@ -58,5 +58,5 @@
 }
 
 SYSTEMD_PACKAGES = "${PN}"
-SYSTEMD_SERVICE_${PN} = "ptpd.service"
+SYSTEMD_SERVICE:${PN} = "ptpd.service"
 SYSTEMD_AUTO_ENABLE = "disable"