diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 5f7ad0552c0381e9ffe4136cf77cdb050200231f..b6865f07046422fcc39278262a000eac774810c2 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -15,6 +15,7 @@
 
 #include <linux/list.h>
 #include <linux/rbtree.h>
+#include <linux/ktime.h>
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/bug.h>