diff --git a/bsp/simulator/rtconfig.h b/bsp/simulator/rtconfig.h
index 1cd28ae5dd0d76bd381df6e327f1c80cbbd24fec..a1f877de2eaf5e45e8ba2e5090c82e1b99f5ae6b 100755
--- a/bsp/simulator/rtconfig.h
+++ b/bsp/simulator/rtconfig.h
@@ -133,7 +133,7 @@
 /* #define RT_USING_DFS_NFS */
 
 /* DFS: UFFS nand file system options */
-//#define RT_USING_DFS_UFFS
+#define RT_USING_DFS_UFFS
 /* configuration for uffs, more to see dfs_uffs.h and uffs_config.h */
 #define RT_CONFIG_UFFS_ECC_MODE  UFFS_ECC_HW_AUTO
 /* enable this ,you need provide a mark_badblock/check_block function */
diff --git a/components/dfs/filesystems/uffs/SConscript b/components/dfs/filesystems/uffs/SConscript
index f822cf5d733e1b0f16cb2fef62f43e0d3b2c90d4..53f7713fc2e4a4017be80d1ebfb2dd08654c2a12 100644
--- a/components/dfs/filesystems/uffs/SConscript
+++ b/components/dfs/filesystems/uffs/SConscript
@@ -3,9 +3,36 @@
 from building import *
 
 cwd = GetCurrentDir()
+
 src = Glob('*.c')
+
+uffs = Split('''
+src/uffs/uffs_badblock.c
+src/uffs/uffs_blockinfo.c
+src/uffs/uffs_buf.c
+src/uffs/uffs_debug.c
+src/uffs/uffs_device.c
+src/uffs/uffs_ecc.c
+src/uffs/uffs_crc.c
+src/uffs/uffs_fd.c
+src/uffs/uffs_find.c
+src/uffs/uffs_flash.c
+src/uffs/uffs_fs.c
+src/uffs/uffs_init.c
+src/uffs/uffs_mem.c
+src/uffs/uffs_mtb.c
+src/uffs/uffs_pool.c
+src/uffs/uffs_public.c
+src/uffs/uffs_tree.c
+src/uffs/uffs_utils.c
+src/uffs/uffs_version.c
+
+''')
+
+src = src + uffs
+ 
 CPPPATH = [cwd, cwd + '/src/inc']
 
-group = DefineGroup('Filesystem', src, depend = ['RT_USING_DFS', 'RT_USING_DFS_UFFS'], CPPPATH = CPPPATH)
+group = DefineGroup('Filesystem', src , depend = ['RT_USING_DFS', 'RT_USING_DFS_UFFS'], CPPPATH = CPPPATH)
 
 Return('group')