diff --git a/packages/babel-helpers/src/helpers.js b/packages/babel-helpers/src/helpers.js
index 2779c54e91..705d607f45 100644
--- a/packages/babel-helpers/src/helpers.js
+++ b/packages/babel-helpers/src/helpers.js
@@ -379,11 +379,9 @@ helpers.inherits = template(`
 
 helpers.inheritsLoose = template(`
   (function (subClass, superClass) {
-    subClass.prototype = Object.create(superClass && superClass.prototype);
+    subClass.prototype = Object.create(superClass.prototype);
     subClass.prototype.constructor = subClass;
-    if (superClass) {
-      subClass.__proto__ = superClass;
-    }
+    subClass.__proto__ = superClass;
   })
 `);
 
diff --git a/packages/babel-plugin-transform-es2015-classes/test/fixtures/loose-classCallCheck/with-superClass/expected.js b/packages/babel-plugin-transform-es2015-classes/test/fixtures/loose-classCallCheck/with-superClass/expected.js
index e473ba9a82..2ba8ea8a73 100644
--- a/packages/babel-plugin-transform-es2015-classes/test/fixtures/loose-classCallCheck/with-superClass/expected.js
+++ b/packages/babel-plugin-transform-es2015-classes/test/fixtures/loose-classCallCheck/with-superClass/expected.js
@@ -1,4 +1,4 @@
-function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass && superClass.prototype); subClass.prototype.constructor = subClass; if (superClass) { subClass.__proto__ = superClass; } }
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }
 
 let B = function B() {};