diff --git a/weed/operation/delete_content.go b/weed/operation/delete_content.go
index 2d7e71c6e..41f98e4d4 100644
--- a/weed/operation/delete_content.go
+++ b/weed/operation/delete_content.go
@@ -22,7 +22,7 @@ type DeleteResult struct {
 }
 
 func DeleteFromVolumeServer(fileUrlOnVolume string, jwt security.EncodedJwt) error {
-	err = util.Delete(fileUrlOnVolume, jwt)
+	err := util.Delete(fileUrlOnVolume, jwt)
 	if err != nil {
 		return fmt.Errorf("Failed to delete %s:%v", fileUrlOnVolume, err)
 	}
diff --git a/weed/wdclient/masterclient.go b/weed/wdclient/masterclient.go
index 13383c9f1..d2d5954e4 100644
--- a/weed/wdclient/masterclient.go
+++ b/weed/wdclient/masterclient.go
@@ -68,10 +68,10 @@ func (mc *MasterClient) tryAllMasters() {
 						PublicUrl: volumeLocation.PublicUrl,
 					}
 					for _, newVid := range volumeLocation.NewVids {
-						mc.AddLocation(newVid, loc)
+						mc.addLocation(newVid, loc)
 					}
 					for _, deletedVid := range volumeLocation.DeletedVids {
-						mc.DeleteLocation(deletedVid, loc)
+						mc.deleteLocation(deletedVid, loc)
 					}
 				}
 			}
diff --git a/weed/wdclient/vid_map.go b/weed/wdclient/vid_map.go
index 93884c53d..7299606af 100644
--- a/weed/wdclient/vid_map.go
+++ b/weed/wdclient/vid_map.go
@@ -40,7 +40,7 @@ func (vc *VidMap) LookupFileId(fileId string) (fullUrl string, err error) {
 	if len(parts) != 2 {
 		return "", errors.New("Invalid fileId " + fileId)
 	}
-	serverUrl, lookupError := LookupVolumeServerUrl(parts[0])
+	serverUrl, lookupError := vc.LookupVolumeServerUrl(parts[0])
 	if lookupError != nil {
 		return "", lookupError
 	}
@@ -54,7 +54,7 @@ func (vc *VidMap) GetLocations(vid uint32) (locations []Location) {
 	return vc.vid2Locations[vid]
 }
 
-func (vc *VidMap) AddLocation(vid uint32, location Location) {
+func (vc *VidMap) addLocation(vid uint32, location Location) {
 	vc.Lock()
 	defer vc.Unlock()
 
@@ -74,7 +74,7 @@ func (vc *VidMap) AddLocation(vid uint32, location Location) {
 
 }
 
-func (vc *VidMap) DeleteLocation(vid uint32, location Location) {
+func (vc *VidMap) deleteLocation(vid uint32, location Location) {
 	vc.Lock()
 	defer vc.Unlock()