diff --git a/source/ff.h b/source/ff.h
index 8fbc122d8eba02bbd939a24285b64ca3e078639f..41cc3c0f0268862c1a74019364a79b2d1562daf6 100644
--- a/source/ff.h
+++ b/source/ff.h
@@ -568,6 +568,7 @@ int ff_del_syncobj (FF_SYNC_t* sobj);	/* Delete a sync object */
 #define	AM_SYS	0x04	/* System */
 #define AM_DIR	0x10	/* Directory */
 #define AM_ARC	0x20	/* Archive */
+#define AM_LNK	0x80	/* Symbol link */
 
 #ifdef LOSCFG_FS_FAT_VIRTUAL_PARTITION
 #define FS_PARENT	0x00