diff --git a/components/dfs/src/dfs.c b/components/dfs/src/dfs.c
index 31102f49bdf6c5bdd5eb0a242143a06f4947b0ab..46e3e5122962c469c023183cf0b0c3c8c739fe16 100644
--- a/components/dfs/src/dfs.c
+++ b/components/dfs/src/dfs.c
@@ -540,7 +540,7 @@ int list_fd(void)
     {
         struct dfs_fd *fd = fd_table->fds[index];
 
-        if (fd != RT_NULL)
+        if (fd && fd->fops)
         {
             rt_kprintf("%2d ", index);
             if (fd->type == FT_DIRECTORY)    rt_kprintf("%-7.7s ", "dir");