diff --git a/tools/cache/mutation_detector.go b/tools/cache/mutation_detector.go
index 8e6338a1..e2aa4484 100644
--- a/tools/cache/mutation_detector.go
+++ b/tools/cache/mutation_detector.go
@@ -24,6 +24,8 @@ import (
 	"sync"
 	"time"
 
+	"github.com/golang/glog"
+
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/util/diff"
 )
@@ -43,6 +45,7 @@ func NewCacheMutationDetector(name string) CacheMutationDetector {
 	if !mutationDetectionEnabled {
 		return dummyMutationDetector{}
 	}
+	glog.Warningln("Mutation detector is enabled, this will result in memory leakage.")
 	return &defaultCacheMutationDetector{name: name, period: 1 * time.Second}
 }