diff --git a/packages/react/index.js b/packages/react/index.js
index 890b06084738a..247d17ec01b8d 100644
--- a/packages/react/index.js
+++ b/packages/react/index.js
@@ -7,7 +7,7 @@
  * @flow
  */
 
-// Keep in sync with https://github.com/facebook/flow/blob/main/lib/react.js
+// Keep in sync with https://github.com/facebook/flow/blob/master/lib/react.js
 export type StatelessFunctionalComponent<
   P,
 > = React$StatelessFunctionalComponent<P>;