diff --git a/src/plugins/flow.js b/src/plugins/flow.js
index c2450f351f..f42543b58f 100644
--- a/src/plugins/flow.js
+++ b/src/plugins/flow.js
@@ -1051,8 +1051,8 @@ export default function (instance) {
   });
 
   // parse type parameters for class methods
-  instance.extend("parseClassMethod", function () {
-    return function (classBody, method, isGenerator, isAsync) {
+  instance.extend("parseClassMethod", function (inner) {
+    return function (classBody, method, ...args) {
       if (method.variance) {
         this.unexpected(method.variancePos);
       }
@@ -1061,8 +1061,8 @@ export default function (instance) {
       if (this.isRelational("<")) {
         method.typeParameters = this.flowParseTypeParameterDeclaration();
       }
-      this.parseMethod(method, isGenerator, isAsync);
-      classBody.body.push(this.finishNode(method, "ClassMethod"));
+
+      inner.call(this, classBody, method, ...args);
     };
   });