diff --git a/bsp/stm32f429-apollo/applications/SConscript b/bsp/stm32f429-apollo/applications/SConscript
index d0980be7f7970883a0225aced839614ce560f893..1a7ea1cf577b847586d0f909dc61f0ba5f62f22e 100644
--- a/bsp/stm32f429-apollo/applications/SConscript
+++ b/bsp/stm32f429-apollo/applications/SConscript
@@ -1,21 +1,16 @@
-Import('RTT_ROOT')
-Import('rtconfig')
 from building import *
 
-cwd     = os.path.join(str(Dir('#')), 'applications')
-#src	= Glob('*.c')
+cwd     = GetCurrentDir()
 CPPPATH = [cwd, str(Dir('#'))]
-
-src = Split("""
+src     = Split("""
 application.c
 startup.c
 """)
 
-# add gpio drivers.
+# add UI engine demo.
 if GetDepend('RT_USING_GUIENGINE'):
     src += ['rtgui_demo.c']
 
-
 group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)
 
 Return('group')
diff --git a/bsp/stm32f429-apollo/drivers/SConscript b/bsp/stm32f429-apollo/drivers/SConscript
index 9d8e32a77d1040aef09403a84b30ec6e3b3f8b5b..d6a93ac1b516868550e9d8e3b8b44ee099bc4c39 100644
--- a/bsp/stm32f429-apollo/drivers/SConscript
+++ b/bsp/stm32f429-apollo/drivers/SConscript
@@ -1,8 +1,6 @@
-Import('RTT_ROOT')
-Import('rtconfig')
 from building import *
 
-cwd     = os.path.join(str(Dir('#')), 'drivers')
+cwd = GetCurrentDir()
 
 # add the general drivers.
 src = Split("""
@@ -15,7 +13,9 @@ drv_nand.c
 drv_mpu.c
 """)
 
-#drv_sdio_sd.c
+# add sdio driver
+if GetDepend('RT_USING_DFS'):
+    src += ['drv_sdio_sd.c']
 
 # add Ethernet drivers.
 if GetDepend('RT_USING_LWIP'):