diff --git a/arch/mips/mach-mtmips/mt7628/ddr.c b/arch/mips/mach-mtmips/mt7628/ddr.c
index 06c0ca6..3df85cd 100644
--- a/arch/mips/mach-mtmips/mt7628/ddr.c
+++ b/arch/mips/mach-mtmips/mt7628/ddr.c
@@ -8,6 +8,7 @@
 #include <common.h>
 #include <asm/addrspace.h>
 #include <linux/bitops.h>
+#include <linux/delay.h>
 #include <linux/sizes.h>
 #include <linux/io.h>
 #include <mach/ddr.h>