diff --git a/app/extend/context.js b/app/extend/context.js
index 6edc2154e1..b34bbaf8d6 100644
--- a/app/extend/context.js
+++ b/app/extend/context.js
@@ -44,8 +44,8 @@ const proto = module.exports = {
    * @param {Object} [options] - options for request.
    * @return {Object} see {@link ContextHttpClient#curl}
    */
-  * curl(url, options) {
-    return yield this.httpclient.curl(url, options);
+  curl(url, options) {
+    return this.httpclient.curl(url, options);
   },
 
   /**
diff --git a/lib/core/context_httpclient.js b/lib/core/context_httpclient.js
index b3cccd78b6..65a654e5af 100644
--- a/lib/core/context_httpclient.js
+++ b/lib/core/context_httpclient.js
@@ -14,14 +14,14 @@ class ContextHttpClient {
    * @param {Object} [options] - options for request.
    * @return {Object} see {@link Application#curl}
    */
-  * curl(url, options) {
+  curl(url, options) {
     options = options || {};
     options.ctx = this.ctx;
-    return yield this.app.curl(url, options);
+    return this.app.curl(url, options);
   }
 
-  * request(url, options) {
-    return yield this.curl(url, options);
+  request(url, options) {
+    return this.curl(url, options);
   }
 }
 
diff --git a/lib/egg.js b/lib/egg.js
index a64eecfcfc..755fa4e61a 100644
--- a/lib/egg.js
+++ b/lib/egg.js
@@ -159,8 +159,8 @@ class EggApplication extends EggCore {
    * console.log(result.status, result.headers, result.data);
    * ```
    */
-  * curl(url, opts) {
-    return yield this.httpclient.request(url, opts);
+  curl(url, opts) {
+    return this.httpclient.request(url, opts);
   }
 
   /**
diff --git a/test/app/extend/context.test.js b/test/app/extend/context.test.js
index 1a6ef8a49d..ab41d28aa8 100644
--- a/test/app/extend/context.test.js
+++ b/test/app/extend/context.test.js
@@ -294,6 +294,12 @@ describe('test/app/extend/context.test.js', () => {
         const res = yield context.curl(`${localServer}/foo/bar`);
         res.status.should.equal(200);
       });
+
+      it('should curl as promise ok', () => {
+        return utils.startLocalServer()
+        .then(localServer => app.mockContext().curl(`${localServer}/foo/bar`))
+        .then(res => res.status.should.equal(200));
+      });
     });
 
     describe('ctx.httpclient', () => {