diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 37f9279..3bef961 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -140,6 +140,7 @@
 
 /**
  * struct hrtimer_base - the timer base for a specific clock
+ * @cpu_base:		per cpu clock base
  * @index:		clock type index for per_cpu support when moving a
  *			timer to a base on another cpu.
  * @active:		red black tree root node for the active timers