diff --git a/pkg/proxy/metrics/metrics.go b/pkg/proxy/metrics/metrics.go
index 96cdc6e79e..c5c1d8feda 100644
--- a/pkg/proxy/metrics/metrics.go
+++ b/pkg/proxy/metrics/metrics.go
@@ -41,7 +41,7 @@ var (
 		prometheus.HistogramOpts{
 			Subsystem: kubeProxySubsystem,
 			Name:      "sync_proxy_rules_latency_microseconds",
-			Help:      "SyncProxyRules latency in microseconds",
+			Help:      "(Deprecated) SyncProxyRules latency in microseconds",
 			Buckets:   prometheus.ExponentialBuckets(1000, 2, 15),
 		},
 	)
diff --git a/pkg/proxy/winkernel/metrics.go b/pkg/proxy/winkernel/metrics.go
index 877cc1f1bd..db91cf1e41 100644
--- a/pkg/proxy/winkernel/metrics.go
+++ b/pkg/proxy/winkernel/metrics.go
@@ -39,7 +39,7 @@ var (
 		prometheus.HistogramOpts{
 			Subsystem: kubeProxySubsystem,
 			Name:      "sync_proxy_rules_latency_microseconds",
-			Help:      "SyncProxyRules latency in microseconds",
+			Help:      "(Deprecated) SyncProxyRules latency in microseconds",
 			Buckets:   prometheus.ExponentialBuckets(1000, 2, 15),
 		},
 	)