diff --git a/data/api/server-server/events.yaml b/data/api/server-server/events.yaml
index 3bce65bf..6d7ca45a 100644
--- a/data/api/server-server/events.yaml
+++ b/data/api/server-server/events.yaml
@@ -139,7 +139,7 @@ paths:
             required: ['auth_chain_ids', 'pdu_ids']
         404:
           description: |-
-            The given `event_id` was found or the server doesn't know about the state at
+            The given `event_id` was not found or the server doesn't know about the state at
             that event to return anything useful.
           examples:
             application/json: {