diff --git a/source/tutorial/deploy-replica-set-with-auth.txt b/source/tutorial/deploy-replica-set-with-auth.txt
index fe0850e4ac1..8495616288e 100644
--- a/source/tutorial/deploy-replica-set-with-auth.txt
+++ b/source/tutorial/deploy-replica-set-with-auth.txt
@@ -16,7 +16,7 @@ key part of a complete security strategy.
 
 All MongoDB deployments support authentication. By default, MongoDB
 does not require authorization checking. You can enforce authorization
-checking when deploying MongoDB, or on an existing deploying; however,
+checking when deploying MongoDB, or on an existing deployment; however,
 you cannot enable authorization checking on a running deployment
 without downtime.