diff --git a/configs/moxa/nsh/defconfig b/configs/moxa/nsh/defconfig
index d8bda8be4c..53df25d6e9 100644
--- a/configs/moxa/nsh/defconfig
+++ b/configs/moxa/nsh/defconfig
@@ -386,6 +386,7 @@ CONFIG_16550_SUPRESS_CONFIG=y
 CONFIG_16550_REGINCR=1
 CONFIG_16550_REGWIDTH=32
 CONFIG_16550_ADDRWIDTH=32
+CONFIG_16550_THRNE=y
 # CONFIG_ARCH_HAVE_UART is not set
 # CONFIG_ARCH_HAVE_UART0 is not set
 # CONFIG_ARCH_HAVE_UART1 is not set
diff --git a/configs/moxa/src/moxart_boot.c b/configs/moxa/src/moxart_boot.c
index 473f5a54ad..f773982d3d 100644
--- a/configs/moxa/src/moxart_boot.c
+++ b/configs/moxa/src/moxart_boot.c
@@ -45,6 +45,7 @@
 #include <errno.h>
 
 #include <nuttx/board.h>
+#include <nuttx/net/ftmac100.h>
 
 /****************************************************************************
  * Pre-processor Definitions
@@ -68,8 +69,6 @@
  ****************************************************************************/
 
 #ifdef CONFIG_BOARD_INITIALIZE
-extern int ftmac100_initialize(int intf);
-
 void board_initialize(void)
 {
 #ifdef CONFIG_NET_FTMAC100
diff --git a/configs/moxa/src/moxart_nsh.c b/configs/moxa/src/moxart_nsh.c
index b21a466c86..1b4c4ea877 100644
--- a/configs/moxa/src/moxart_nsh.c
+++ b/configs/moxa/src/moxart_nsh.c
@@ -45,6 +45,7 @@
 #include <errno.h>
 
 #include <nuttx/board.h>
+#include <nuttx/net/ftmac100.h>
 
 /****************************************************************************
  * Pre-processor Definitions