diff --git a/packages/babel-plugin-transform-inline-environment-variables/README.md b/packages/babel-plugin-transform-inline-environment-variables/README.md
index 72a315f7c3..167d6c42df 100644
--- a/packages/babel-plugin-transform-inline-environment-variables/README.md
+++ b/packages/babel-plugin-transform-inline-environment-variables/README.md
@@ -2,6 +2,21 @@
 
 Inline environment variables
 
+## Example
+
+### In
+
+```js
+// assuming process.env.NODE_ENV is actually "development"
+process.env.NODE_ENV;
+```
+
+### Out
+
+```js
+"development";
+```
+
 ## Installation
 
 ```sh
diff --git a/packages/babel-plugin-transform-inline-environment-variables/src/index.js b/packages/babel-plugin-transform-inline-environment-variables/src/index.js
index 4e80129c81..c4d30464c0 100644
--- a/packages/babel-plugin-transform-inline-environment-variables/src/index.js
+++ b/packages/babel-plugin-transform-inline-environment-variables/src/index.js
@@ -5,7 +5,7 @@ export default function ({ types: t }) {
         if (path.get("object").matchesPattern("process.env")) {
           let key = path.toComputedKey();
           if (t.isStringLiteral(key)) {
-            return t.valueToNode(process.env[key.value]);
+            path.replace(t.valueToNode(process.env[key.value]));
           }
         }
       }