diff --git a/components/fs/vfs/vfs_config.h b/components/fs/vfs/vfs_config.h
index 73102c2d..e70d722c 100644
--- a/components/fs/vfs/vfs_config.h
+++ b/components/fs/vfs/vfs_config.h
@@ -123,6 +123,7 @@
 
 #define CONFIG_NQUEUE_DESCRIPTORS    256
 
+#undef FD_SETSIZE
 #define FD_SETSIZE                      (CONFIG_NFILE_DESCRIPTORS + CONFIG_NSOCKET_DESCRIPTORS)
 #define CONFIG_NEXPANED_DESCRIPTORS     (CONFIG_NTIME_DESCRIPTORS + CONFIG_NQUEUE_DESCRIPTORS)
 #define FD_SET_TOTAL_SIZE               (FD_SETSIZE + CONFIG_NEXPANED_DESCRIPTORS)