diff --git a/x-pack/plugins/actions/server/types.ts b/x-pack/plugins/actions/server/types.ts
index b311a602212c7..81d6c3550a53c 100644
--- a/x-pack/plugins/actions/server/types.ts
+++ b/x-pack/plugins/actions/server/types.ts
@@ -31,6 +31,9 @@ export type ActionTypeSecrets = Record<string, unknown>;
 export type ActionTypeParams = Record<string, unknown>;
 
 export interface Services {
+  /**
+   * @deprecated Use `scopedClusterClient` instead.
+   */
   callCluster: ILegacyScopedClusterClient['callAsCurrentUser'];
   savedObjectsClient: SavedObjectsClientContract;
   scopedClusterClient: ElasticsearchClient;
diff --git a/x-pack/plugins/alerts/server/types.ts b/x-pack/plugins/alerts/server/types.ts
index 027f875e2d08d..bb2d429a7c8b5 100644
--- a/x-pack/plugins/alerts/server/types.ts
+++ b/x-pack/plugins/alerts/server/types.ts
@@ -47,6 +47,9 @@ declare module 'src/core/server' {
 }
 
 export interface Services {
+  /**
+   * @deprecated Use `scopedClusterClient` instead.
+   */
   callCluster: ILegacyScopedClusterClient['callAsCurrentUser'];
   savedObjectsClient: SavedObjectsClientContract;
   scopedClusterClient: ElasticsearchClient;