diff --git a/packages/babel-plugin-transform-react-jsx-source/README.md b/packages/babel-plugin-transform-react-jsx-source/README.md
index f62a79a4e6..58dddc0c1c 100644
--- a/packages/babel-plugin-transform-react-jsx-source/README.md
+++ b/packages/babel-plugin-transform-react-jsx-source/README.md
@@ -13,7 +13,7 @@
 ### Out
 
 ```
-<sometag __source={{fileName: 'this/file.js', lineNumber: 10}}/>
+<sometag __source={ { fileName: 'this/file.js', lineNumber: 10 } } />
 ```
 
 ## Installation