diff --git a/components/dfs/dfs_v1/src/dfs.c b/components/dfs/dfs_v1/src/dfs.c
index 94bd8385cd..3db9a0bba2 100644
--- a/components/dfs/dfs_v1/src/dfs.c
+++ b/components/dfs/dfs_v1/src/dfs.c
@@ -759,7 +759,7 @@ up_one:
 
     /* remove '/' in the end of path if exist */
     dst--;
-    if (dst >= fullpath && (dst != fullpath) && (*dst == '/'))
+    if (dst > fullpath && (*dst == '/'))
         *dst = '\0';
 
     /* final check fullpath is not empty, for the special path of lwext "/.." */
diff --git a/components/dfs/dfs_v2/src/dfs.c b/components/dfs/dfs_v2/src/dfs.c
index 62e5805d7a..d7a5eac002 100644
--- a/components/dfs/dfs_v2/src/dfs.c
+++ b/components/dfs/dfs_v2/src/dfs.c
@@ -668,7 +668,7 @@ char *dfs_normalize_path(const char *directory, const char *filename)
 
     /* remove '/' in the end of path if exist */
     dst--;
-    if (dst >= fullpath && (dst != fullpath) && (*dst == '/'))
+    if (dst > fullpath && (*dst == '/'))
         *dst = '\0';
 
     /* final check fullpath is not empty, for the special path of lwext "/.." */