diff --git a/ssm b/ssm
index 9e8af31..1a6caa0 100755
--- a/ssm
+++ b/ssm
@@ -775,7 +775,7 @@ if cgroups; then
 
 	# If there's a service PID, check if it's in the service's cgroup
 	if service_cgroup_strict; then
-		if service_pid; then
+		if service_running; then
 			service_cgroup_procs u "$service_pid" || die 29 "Recorded service PID is not in the service's cgroup, bailing!"
 		fi
 	fi