diff --git a/specification/server_server_api.rst b/specification/server_server_api.rst
index 5f791a70..b5676b78 100644
--- a/specification/server_server_api.rst
+++ b/specification/server_server_api.rst
@@ -606,7 +606,7 @@ the events it is missing.
 {{backfill_ss_http_api}}
 
 Retrieving events
-----------------
+-----------------
 
 In some circumstances, a homeserver may be missing a particular event or information
 about the room which cannot be easily determined from backfilling. These APIs provide