diff --git a/arch/x86/cpu/broadwell/iobp.c b/arch/x86/cpu/broadwell/iobp.c
index 8a3ca6c..cb5595c 100644
--- a/arch/x86/cpu/broadwell/iobp.c
+++ b/arch/x86/cpu/broadwell/iobp.c
@@ -10,6 +10,7 @@
 #include <asm/intel_regs.h>
 #include <asm/io.h>
 #include <asm/arch/pch.h>
+#include <linux/delay.h>
 
 #define IOBP_RETRY 1000