diff --git a/src/index.ts b/src/index.ts
index ed4aef3..3d42f2f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -50,9 +50,7 @@ export abstract class Client {
     const moduleBag = await this.loadBound(module);
     this._callModule = async (...args) => {
       const ret = await moduleBag.callModule(...args);
-      this.handleError(ret);
-
-      return ret;
+      return this.handleErrorOrReturn(ret);
     };
     this._connectModule = moduleBag.connectModule;
   }
@@ -66,6 +64,10 @@ export abstract class Client {
       throw new Error(ret[1]);
     }
   }
+  protected handleErrorOrReturn(ret: ErrTuple): any {
+    this.handleError(ret);
+    return ret[0];
+  }
   protected async callModuleReturn(method: string, data?: any): Promise<any> {
     const ret = await this.callModule(method, data);