diff --git a/components/drivers/serial/serial.c b/components/drivers/serial/serial.c
index e8e0e17a5583c638b212163315c38e915d32cef9..eaab5868885414e0d85dbb090b4b52cce58058c9 100644
--- a/components/drivers/serial/serial.c
+++ b/components/drivers/serial/serial.c
@@ -38,9 +38,6 @@
 #include <dfs_posix.h>
 #include <dfs_poll.h>
 
-#include <posix_termios.h>
-
-
 /* it's possible the 'getc/putc' is defined by stdio.h in gcc/newlib. */
 #ifdef getc
 #undef getc
diff --git a/components/drivers/tty/SConscript b/components/drivers/tty/SConscript
index 34e8aaccadd989ad2b37b028b5f7a3d694f4f953..3c561f4e46165e19cb3ebbc29e06e56a3c11857c 100644
--- a/components/drivers/tty/SConscript
+++ b/components/drivers/tty/SConscript
@@ -4,8 +4,7 @@ from building import *
 src = Glob('*.c')
 cwd = GetCurrentDir()
 CPPPATH = [cwd + "/include"]
-group = []
-if GetDepend('RT_USING_LWP'):
-    group = DefineGroup('tty', src, depend = ['RT_USING_TTY'], CPPPATH = CPPPATH)
-    
+
+group = DefineGroup('tty', src, depend = ['RT_USING_LWP', 'RT_USING_TTY'], CPPPATH = CPPPATH)
+
 Return('group')
diff --git a/components/drivers/tty/tty.c b/components/drivers/tty/tty.c
index 7bd3c3c6409b22ff37ec9072072cd876a4c08c6f..b88a4b700f62cb71bbe08a00d1162b51befcdd23 100644
--- a/components/drivers/tty/tty.c
+++ b/components/drivers/tty/tty.c
@@ -14,6 +14,7 @@
 #include <rtthread.h>
 #include <tty.h>
 #include <tty_ldisc.h>
+
 #if defined(RT_USING_POSIX)
 #include <posix_termios.h>
 #endif