diff --git a/components/dfs/src/dfs.c b/components/dfs/src/dfs.c
index e5a8aa549d..c83aad3e2d 100644
--- a/components/dfs/src/dfs.c
+++ b/components/dfs/src/dfs.c
@@ -128,7 +128,7 @@ int fd_new(void)
     /* can't find an empty fd entry */
     if (idx == DFS_FD_MAX)
     {
-        idx = -1;
+        idx = -(1 + DFS_FD_OFFSET);
         goto __result;
     }