diff --git a/weed/server/volume_grpc_replicate.go b/weed/server/volume_grpc_replicate.go
index c641755d0..ae720144e 100644
--- a/weed/server/volume_grpc_replicate.go
+++ b/weed/server/volume_grpc_replicate.go
@@ -153,7 +153,7 @@ func (vs *VolumeServer) ReadVolumeFileStatus(ctx context.Context, req *volume_se
 	resp.IdxFileSize = v.IndexFileSize()
 	resp.DatFileTimestamp = v.LastModifiedTime()
 	resp.IdxFileTimestamp = v.LastModifiedTime()
-	resp.FileCount = uint64(v.FileCount())
+	resp.FileCount = v.FileCount()
 	return resp, nil
 }
 
diff --git a/weed/storage/volume.go b/weed/storage/volume.go
index 280963c2c..572040d61 100644
--- a/weed/storage/volume.go
+++ b/weed/storage/volume.go
@@ -94,8 +94,8 @@ func (v *Volume)LastModifiedTime() uint64 {
 	return v.lastModifiedTime
 }
 
-func (v *Volume)FileCount() uint {
-	return uint(v.nm.FileCount())
+func (v *Volume)FileCount() uint64 {
+	return uint64(v.nm.FileCount())
 }
 
 // Close cleanly shuts down this volume