diff --git a/slides/k8s/openid-connect.md b/slides/k8s/openid-connect.md
index af75a191..9d4a9948 100644
--- a/slides/k8s/openid-connect.md
+++ b/slides/k8s/openid-connect.md
@@ -64,7 +64,7 @@
 
   - indicate which audience (or "client id") should be allowed
 
-  - if necessary, map or prefix user and group names
+  - optionally, map or prefix user and group names
 
 - Client side