diff --git a/packages/primus/client.d.ts b/packages/primus/client.d.ts
index ab9fb5d5ea..8a9c43c0bd 100644
--- a/packages/primus/client.d.ts
+++ b/packages/primus/client.d.ts
@@ -1,4 +1,4 @@
 
-declare function e(config:any, configurer:any | Function): () => void;
+declare function e(config:any | socket:any, configurer:any | Function | undefined): () => void;
 declare namespace e{}
 export = e;