diff --git a/bsp/jz47xx/SConscript b/bsp/jz47xx/SConscript
index a6b0ebb6de3bde4fd10c8f0d93bb6389ed6c142e..a5ba6927afa0c4ef8e609b368fd40716ece26715 100644
--- a/bsp/jz47xx/SConscript
+++ b/bsp/jz47xx/SConscript
@@ -6,7 +6,7 @@ src_bsp   = ['application.c', 'startup.c', 'board.c']
 src_drv   = ['uart.c']
 
 src	= File(src_bsp + src_drv)
-CPPPATH = Dir('#')
+CPPPATH = str(Dir('#'))
 group = DefineGroup('Startup', src, depend = [''], CPPPATH = CPPPATH)
 
 Return('group')
diff --git a/bsp/taihu/applications/SConscript b/bsp/taihu/applications/SConscript
index d73cc9337aee94c13e29e0eb8131a06a84736f05..0e743b599ae3b82d04597c32dbc7f4763ac1d03c 100644
--- a/bsp/taihu/applications/SConscript
+++ b/bsp/taihu/applications/SConscript
@@ -4,7 +4,7 @@ from building import *
 
 cwd = GetCurrentDir()
 src = Glob('*.c')
-CPPPATH = [cwd, Dir('#')]
+CPPPATH = [cwd, str(Dir('#'))]
 
 group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)