diff --git a/bsp/ls2kdev/drivers/board.c b/bsp/ls2kdev/drivers/board.c
index 20b7a84516..6a66777121 100644
--- a/bsp/ls2kdev/drivers/board.c
+++ b/bsp/ls2kdev/drivers/board.c
@@ -12,6 +12,7 @@
 #include <rthw.h>
 
 #include "mips_regs.h"
+#include "mips_fpu.h"
 #include "exception.h"
 #include "drv_uart.h"
 #include "board.h"