diff --git a/docs/modules/spam_checker_callbacks.md b/docs/modules/spam_checker_callbacks.md
index 0ad9d9b54c83..534ea196e0d8 100644
--- a/docs/modules/spam_checker_callbacks.md
+++ b/docs/modules/spam_checker_callbacks.md
@@ -28,6 +28,8 @@ any of the subsequent implementations of this callback.
 
 ### `user_may_join_room`
 
+_First introduced in Synapse v1.37.0_
+
 ```python
 async def user_may_join_room(user: str, room: str, is_invited: bool) -> bool
 ```
@@ -65,6 +67,8 @@ any of the subsequent implementations of this callback.
 
 ### `user_may_send_3pid_invite`
 
+_First introduced in Synapse v1.45.0_
+
 ```python
 async def user_may_send_3pid_invite(
     inviter: str,
@@ -121,6 +125,8 @@ any of the subsequent implementations of this callback.
 
 ### `user_may_create_room_with_invites`
 
+_First introduced in Synapse v1.44.0_
+
 ```python
 async def user_may_create_room_with_invites(
     user: str,