diff --git a/docs/source/high-availablility.rst b/docs/source/high-availablility.rst
index 09d0aa7a96..61fdce53e9 100644
--- a/docs/source/high-availablility.rst
+++ b/docs/source/high-availablility.rst
@@ -49,7 +49,7 @@ Fields
 
 :machineName: Unique name for node.
 
-:updateInterval: Rate(milliseconds) at which the running node updates the mutual exclusion lease.
+:updateInterval: Period(milliseconds) over which the running node updates the mutual exclusion lease.
 
 :waitInterval: Amount of time(milliseconds) to wait since last mutual exclusion lease update before being able to become the master node. This has to be greater than updateInterval.