diff --git a/board/technologic/ts4600/ts4600.c b/board/technologic/ts4600/ts4600.c
index 2a63e84..54508cd 100644
--- a/board/technologic/ts4600/ts4600.c
+++ b/board/technologic/ts4600/ts4600.c
@@ -21,6 +21,7 @@
 #include <asm/arch/iomux-mx28.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/sys_proto.h>
+#include <linux/delay.h>
 #include <linux/mii.h>
 #include <miiphy.h>
 #include <netdev.h>