diff --git a/drivers/scsi/sun_esp.c b/drivers/scsi/sun_esp.c
index 8c766bcd1095..bbeb2451d32f 100644
--- a/drivers/scsi/sun_esp.c
+++ b/drivers/scsi/sun_esp.c
@@ -5,6 +5,7 @@
 
 #include <linux/kernel.h>
 #include <linux/types.h>
+#include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/init.h>