diff --git a/docs/administration/4_adminapi.md b/docs/administration/4_adminapi.md
index 56e19a8b4..c521cbc90 100644
--- a/docs/administration/4_adminapi.md
+++ b/docs/administration/4_adminapi.md
@@ -44,7 +44,9 @@ This endpoint will instruct Dendrite to part the given local `userID` in the URL
 all rooms which they are currently joined. A JSON body will be returned containing
 the room IDs of all affected rooms.
 
-## POST `/_dendrite/admin/resetPassword/{localpart}`
+## POST `/_dendrite/admin/resetPassword/{userID}`
+
+Reset the password of a local user.
 
 Request body format:
 
@@ -54,9 +56,6 @@ Request body format:
 }
 ```
 
-Reset the password of a local user. The `localpart` is the username only, i.e. if
-the full user ID is `@alice:domain.com` then the local part is `alice`.
-
 ## GET `/_dendrite/admin/fulltext/reindex`
 
 This endpoint instructs Dendrite to reindex all searchable events (`m.room.message`, `m.room.topic` and `m.room.name`). An empty JSON body will be returned immediately.