diff --git a/components/dfs/include/dfs_file.h b/components/dfs/include/dfs_file.h
index 7ef681a247ecfa14e9f83427eaf81b0896538961..aaff3f6e9c00e8db10846632d73b87c2a0b2e2b8 100644
--- a/components/dfs/include/dfs_file.h
+++ b/components/dfs/include/dfs_file.h
@@ -44,6 +44,7 @@ struct dfs_fd
     char *path;                  /* Name (below mount point) */
     int ref_count;               /* Descriptor reference count */
 
+    struct dfs_filesystem *fs;
     const struct dfs_file_ops *fops;
 
     uint32_t flags;              /* Descriptor flags */
diff --git a/components/dfs/src/dfs.c b/components/dfs/src/dfs.c
index 1850ac426cdceceea3ac225ffadc223db5caca59..066c800568189fab680b63e4134f649e9607c3b1 100644
--- a/components/dfs/src/dfs.c
+++ b/components/dfs/src/dfs.c
@@ -320,7 +320,7 @@ int fd_is_open(const char *pathname)
             fd = fdt->fds[index];
             if (fd == NULL || fd->fops == NULL || fd->path == NULL) continue;
 
-            if (fd->fops == fs->ops->fops && strcmp(fd->path, mountpath) == 0)
+            if (fd->fs == fs && strcmp(fd->path, mountpath) == 0)
             {
                 /* found file in file descriptor table */
                 rt_free(fullpath);
diff --git a/components/dfs/src/dfs_file.c b/components/dfs/src/dfs_file.c
index e7071522cecb74f86a353dfd073d2f64d56f5d33..4505667738169860108d1f1b7796fde125cd0e9d 100644
--- a/components/dfs/src/dfs_file.c
+++ b/components/dfs/src/dfs_file.c
@@ -66,7 +66,8 @@ int dfs_file_open(struct dfs_fd *fd, const char *path, int flags)
     }
 
     LOG_D("open in filesystem:%s", fs->ops->name);
-    fd->fops  = fs->ops->fops; /* set file ops */
+    fd->fs    = fs;             /* set file system */
+    fd->fops  = fs->ops->fops;  /* set file ops */
 
     /* initialize the fd item */
     fd->type  = FT_REGULAR;