diff --git a/board/tcl/sl50/board.c b/board/tcl/sl50/board.c
index c7eed31..a958827 100644
--- a/board/tcl/sl50/board.c
+++ b/board/tcl/sl50/board.c
@@ -10,6 +10,7 @@
 #include <common.h>
 #include <env.h>
 #include <errno.h>
+#include <serial.h>
 #include <spl.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/hardware.h>