diff --git a/monitor/service_files/json/phosphor-fan-monitor@.service.in b/monitor/service_files/json/phosphor-fan-monitor@.service.in
index 3dd66aa..0975784 100644
--- a/monitor/service_files/json/phosphor-fan-monitor@.service.in
+++ b/monitor/service_files/json/phosphor-fan-monitor@.service.in
@@ -1,5 +1,6 @@
 [Unit]
 Description=Phosphor Fan Monitor Daemon
+After=mapper-wait@-xyz-openbmc_project-inventory.service
 
 [Service]
 Restart=on-failure