diff --git a/components/dfs/src/dfs_fs.c b/components/dfs/src/dfs_fs.c
index 406403e51e24b95c2b6cd57a135eb1984a569b9b..a41f36cf09a33347418e434b0f2c1995a4f62ef6 100644
--- a/components/dfs/src/dfs_fs.c
+++ b/components/dfs/src/dfs_fs.c
@@ -85,6 +85,8 @@ struct dfs_filesystem *dfs_filesystem_lookup(const char *path)
 
     prefixlen = 0;
 
+    RT_ASSERT(path);
+
     /* lock filesystem */
     dfs_lock();