diff --git a/cmd/kube-controller-manager/app/certificates.go b/cmd/kube-controller-manager/app/certificates.go
index 752e2c5a1bb..3ecf69e395f 100644
--- a/cmd/kube-controller-manager/app/certificates.go
+++ b/cmd/kube-controller-manager/app/certificates.go
@@ -39,7 +39,9 @@ import (
 )
 
 func startCSRSigningController(ctx ControllerContext) (http.Handler, bool, error) {
-	if !ctx.AvailableResources[schema.GroupVersionResource{Group: "certificates.k8s.io", Version: "v1beta1", Resource: "certificatesigningrequests"}] {
+	gvr := schema.GroupVersionResource{Group: "certificates.k8s.io", Version: "v1beta1", Resource: "certificatesigningrequests"}
+	if !ctx.AvailableResources[gvr] {
+		klog.Warningf("Resource %s is not available now", gvr.String())
 		return nil, false, nil
 	}
 	if ctx.ComponentConfig.CSRSigningController.ClusterSigningCertFile == "" || ctx.ComponentConfig.CSRSigningController.ClusterSigningKeyFile == "" {
@@ -102,7 +104,9 @@ func startCSRSigningController(ctx ControllerContext) (http.Handler, bool, error
 }
 
 func startCSRApprovingController(ctx ControllerContext) (http.Handler, bool, error) {
-	if !ctx.AvailableResources[schema.GroupVersionResource{Group: "certificates.k8s.io", Version: "v1beta1", Resource: "certificatesigningrequests"}] {
+	gvr := schema.GroupVersionResource{Group: "certificates.k8s.io", Version: "v1beta1", Resource: "certificatesigningrequests"}
+	if !ctx.AvailableResources[gvr] {
+		klog.Warningf("Resource %s is not available now", gvr.String())
 		return nil, false, nil
 	}