diff --git a/backends/s3/s3.go b/backends/s3/s3.go
index 17f6725..b48837f 100644
--- a/backends/s3/s3.go
+++ b/backends/s3/s3.go
@@ -167,11 +167,6 @@ func (b S3Backend) Unlock(filename string) (err error) {
 	return
 }
 
-func (b S3Backend) CheckLock(filename string) (locked bool, err error) {
-	log.Printf("Locking is not supported on S3")
-	return
-}
-
 func (b S3Backend) Put(key string, r io.Reader, expiry time.Time, deleteKey, accessKey string, srcIp string) (m backends.Metadata, err error) {
 	tmpDst, err := ioutil.TempFile("", "linx-server-upload")
 	if err != nil {