diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c
index 2620baa1f6993db5e6706a36240ab4c6a2931038..507212d75ee2c473c1ca8fd38f9eeedc1d6894ee 100644
--- a/block/blk-iolatency.c
+++ b/block/blk-iolatency.c
@@ -75,6 +75,7 @@
 #include <linux/blk-mq.h>
 #include "blk-rq-qos.h"
 #include "blk-stat.h"
+#include "blk.h"
 
 #define DEFAULT_SCALE_COOKIE 1000000U