diff --git a/pkg/kubelet/dockershim/docker_image_linux.go b/pkg/kubelet/dockershim/docker_image_linux.go
index ffaad085f99..25e3d7a074e 100644
--- a/pkg/kubelet/dockershim/docker_image_linux.go
+++ b/pkg/kubelet/dockershim/docker_image_linux.go
@@ -30,7 +30,7 @@ import (
 )
 
 // ImageFsInfo returns information of the filesystem that is used to store images.
-func (ds *dockerService) ImageFsInfo(_ context.Context, r *runtimeapi.ImageFsInfoRequest) (*runtimeapi.ImageFsInfoResponse, error) {
+func (ds *dockerService) ImageFsInfo(_ context.Context, _ *runtimeapi.ImageFsInfoRequest) (*runtimeapi.ImageFsInfoResponse, error) {
 	info, err := ds.client.Info()
 	if err != nil {
 		klog.Errorf("Failed to get docker info: %v", err)