diff --git a/ttl/metrics/metrics.go b/ttl/metrics/metrics.go
index 3389cf16f5d7f..6223b6219793e 100644
--- a/ttl/metrics/metrics.go
+++ b/ttl/metrics/metrics.go
@@ -73,6 +73,9 @@ func InitMetricsVars() {
 
 	ScanningTaskCnt = metrics.TTLTaskStatus.With(prometheus.Labels{metrics.LblType: "scanning"})
 	DeletingTaskCnt = metrics.TTLTaskStatus.With(prometheus.Labels{metrics.LblType: "deleting"})
+
+	scanWorkerPhases = initWorkerPhases("scan_worker")
+	deleteWorkerPhases = initWorkerPhases("delete_worker")
 }
 
 func initWorkerPhases(workerType string) map[string]prometheus.Counter {
@@ -89,8 +92,8 @@ func initWorkerPhases(workerType string) map[string]prometheus.Counter {
 	}
 }
 
-var scanWorkerPhases = initWorkerPhases("scan_worker")
-var deleteWorkerPhases = initWorkerPhases("delete_worker")
+var scanWorkerPhases map[string]prometheus.Counter
+var deleteWorkerPhases map[string]prometheus.Counter
 
 // PhaseTracer is used to tracer the phases duration
 type PhaseTracer struct {