diff --git a/dev-test/githunt/flow.flow.js b/dev-test/githunt/flow.flow.js
index 0a075078e5b..de1b602f903 100644
--- a/dev-test/githunt/flow.flow.js
+++ b/dev-test/githunt/flow.flow.js
@@ -1,4 +1,4 @@
-/* @flow */
+// @flow
 
 // @flow
 
diff --git a/dev-test/test-schema/flow-types.flow.js b/dev-test/test-schema/flow-types.flow.js
index c6aac9297a0..c124fc94bea 100644
--- a/dev-test/test-schema/flow-types.flow.js
+++ b/dev-test/test-schema/flow-types.flow.js
@@ -1,4 +1,4 @@
-/* @flow */
+// @flow
 
 import { type GraphQLResolveInfo } from 'graphql';
 export type $RequireFields<Origin, Keys> = $Diff<Origin, Keys> &
diff --git a/packages/plugins/flow/flow/src/index.ts b/packages/plugins/flow/flow/src/index.ts
index 2401cec8353..f927193607d 100644
--- a/packages/plugins/flow/flow/src/index.ts
+++ b/packages/plugins/flow/flow/src/index.ts
@@ -11,7 +11,7 @@ export const plugin: PluginFunction<FlowPluginConfig, Types.ComplexPluginOutput>
   documents: Types.DocumentFile[],
   config: FlowPluginConfig
 ) => {
-  const header = `/* @flow */\n\n`;
+  const header = `// @flow \n\n`;
   const printedSchema = printSchema(schema);
   const astNode = parse(printedSchema);
   const visitor = new FlowVisitor(schema, config);