diff --git a/source/fs/mufs/super.c b/source/fs/mufs/super.c
index e413cf6..1a91772 100644
--- a/source/fs/mufs/super.c
+++ b/source/fs/mufs/super.c
@@ -52,6 +52,9 @@ void mufs_unmount(struct mufs *fs)
 	if (!fs)
 		return;
 
+	if (fs->dev)
+		flash_release(fs->dev);
+
 	free(fs);
 }