diff --git a/weed/filesys/wfs.go b/weed/filesys/wfs.go
index 7ee9a10ea..2a8ecd235 100644
--- a/weed/filesys/wfs.go
+++ b/weed/filesys/wfs.go
@@ -125,6 +125,7 @@ func NewSeaweedFileSystem(option *Option) *WFS {
 	})
 	grace.OnInterrupt(func() {
 		wfs.metaCache.Shutdown()
+		os.RemoveAll(option.getUniqueCacheDir())
 	})
 
 	wfs.root = &Dir{name: wfs.option.FilerMountRootPath, wfs: wfs, id: 1}
diff --git a/weed/mount/weedfs.go b/weed/mount/weedfs.go
index d3342a8de..11958c39e 100644
--- a/weed/mount/weedfs.go
+++ b/weed/mount/weedfs.go
@@ -99,6 +99,7 @@ func NewSeaweedFileSystem(option *Option) *WFS {
 	})
 	grace.OnInterrupt(func() {
 		wfs.metaCache.Shutdown()
+		os.RemoveAll(option.getUniqueCacheDir())
 	})
 
 	if wfs.option.ConcurrentWriters > 0 {