diff --git a/components/init/components_init.c b/components/init/components_init.c
index b5b30e936c..c2b25bcd43 100644
--- a/components/init/components_init.c
+++ b/components/init/components_init.c
@@ -79,7 +79,6 @@ void rt_components_init(void)
 #endif
 
 #if defined(RT_USING_DFS_NFS) && defined(RT_USING_LWIP)
-	extern int nfs_init(void);
 	/* initialize NFSv3 client file system */
 	nfs_init();
 #endif