diff --git a/x-pack/plugins/enterprise_search/server/routes/workplace_search/sources.ts b/x-pack/plugins/enterprise_search/server/routes/workplace_search/sources.ts
index b56c5880dba43..6638aa82b32ad 100644
--- a/x-pack/plugins/enterprise_search/server/routes/workplace_search/sources.ts
+++ b/x-pack/plugins/enterprise_search/server/routes/workplace_search/sources.ts
@@ -859,6 +859,10 @@ export function registerOauthConnectorParamsRoute({
           kibana_host: schema.string(),
           code: schema.maybe(schema.string()),
           session_state: schema.maybe(schema.string()),
+          authuser: schema.maybe(schema.string()),
+          prompt: schema.maybe(schema.string()),
+          hd: schema.maybe(schema.string()),
+          scope: schema.maybe(schema.string()),
           state: schema.string(),
           oauth_token: schema.maybe(schema.string()),
           oauth_verifier: schema.maybe(schema.string()),