diff --git a/pkg/fs/fs.go b/pkg/fs/fs.go
index 0925933..af3f575 100644
--- a/pkg/fs/fs.go
+++ b/pkg/fs/fs.go
@@ -279,7 +279,11 @@ func (fs *FS) CacheStatus(name string) int {
 	fs.mu.RLock()
 	defer fs.mu.RUnlock()
 	if md, ok := fs.md[name]; ok {
-		return int(math.Round(float64(md.Chunks.Size()) / float64(md.Size) * 100))
+		size := md.Chunks.Size()
+		if size == 0 {
+			return -1
+		}
+		return int(math.Round(float64(size) / float64(md.Size) * 100))
 	}
 	return -1
 }