diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c
index b154e057ca67c682d7cb2c1caa3c6ac5b2807e19..6b8396ccb5c44b70cb4205d584665bde592f15fc 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