diff --git a/data/api/server-server/invites-v1.yaml b/data/api/server-server/invites-v1.yaml
index 9468590b..2b97923c 100644
--- a/data/api/server-server/invites-v1.yaml
+++ b/data/api/server-server/invites-v1.yaml
@@ -207,7 +207,7 @@ paths:
               examples:
                 response:
                   value: {
-                    "errcode": "M_MISSING_PARAM",
+                    "errcode": "M_INVALID_PARAM",
                     "error": "Create event not among invite state entries."
                   }
 servers:
diff --git a/data/api/server-server/joins-v2.yaml b/data/api/server-server/joins-v2.yaml
index 816bff9a..c37964b2 100644
--- a/data/api/server-server/joins-v2.yaml
+++ b/data/api/server-server/joins-v2.yaml
@@ -256,8 +256,8 @@ paths:
             The error should be passed through to clients so that they
             may give better feedback to users.
 
-            If `M_MISSING_PARAM` is returned and the request is associated with a
-            Client-Server API request, the Client-Server API request SHOULD fail
+            If `M_MISSING_PARAM` or `M_INVALID_PARAM` is returned and the request is associated
+            with a Client-Server API request, the Client-Server API request SHOULD fail
             with a 5xx error rather than being passed through.
 
             New in `v1.2`, the following error conditions might happen: