diff --git a/content/docs/reference/templates/functions.md b/content/docs/reference/templates/functions.md
index 30e841c..10a5fa0 100644
--- a/content/docs/reference/templates/functions.md
+++ b/content/docs/reference/templates/functions.md
@@ -33,9 +33,9 @@ Adds a member to an existing thread. Does nothing if either argument is invalid.
 {{ closeThread <thread> <lock> }}
 ```
 
-Closes the given thread.
+Closes or locks the given thread. You cannot lock a closed thread, but you can close a locked thread.
 
-- `lock`: whether to also lock the thread. Default `false`.
+- `lock`: whether to lock the thread instead. Default `false`.
 
 #### createForumPost