diff --git a/include/configs/km/km_arm.h b/include/configs/km/km_arm.h
index 4e833fa..79edfa7 100644
--- a/include/configs/km/km_arm.h
+++ b/include/configs/km/km_arm.h
@@ -104,6 +104,7 @@
 
 #ifndef __ASSEMBLY__
 #include <asm/arch/gpio.h>
+#include <linux/delay.h>
 #include <linux/stringify.h>
 extern void __set_direction(unsigned pin, int high);
 void set_sda(int state);