diff --git a/packages/babel-helpers/src/helpers-generated.ts b/packages/babel-helpers/src/helpers-generated.ts
index 35fdc8b03ac3..40101c5e0191 100644
--- a/packages/babel-helpers/src/helpers-generated.ts
+++ b/packages/babel-helpers/src/helpers-generated.ts
@@ -43,7 +43,7 @@ export default Object.freeze({
   ),
   checkInRHS: helper(
     "7.20.1",
-    'export default function _checkInRHS(value){var type=typeof value;if("object"!==type&&"function"!==type)throw TypeError("right-hand side of \'in\' should be an object, got "+type);return value}',
+    "export default function _checkInRHS(value){if(Object(value)!==value)throw TypeError(\"right-hand side of 'in' should be an object, got \"+typeof type);return value}",
   ),
   jsx: helper(
     "7.0.0-beta.0",
diff --git a/packages/babel-helpers/src/helpers/checkInRHS.js b/packages/babel-helpers/src/helpers/checkInRHS.js
index f1273a91d9a4..fad1e1c2a2d4 100644
--- a/packages/babel-helpers/src/helpers/checkInRHS.js
+++ b/packages/babel-helpers/src/helpers/checkInRHS.js
@@ -2,6 +2,9 @@
 
 export default function _checkInRHS(value) {
   if (Object(value) !== value) {
-    throw TypeError("right-hand side of 'in' should be an object, got " + typeof type);
+    throw TypeError(
+      "right-hand side of 'in' should be an object, got " + typeof type
+    );
+  }
   return value;
 }