diff --git a/src/index.js b/src/index.js
index ae60686..f312691 100644
--- a/src/index.js
+++ b/src/index.js
@@ -28,7 +28,7 @@ export default declare(({
     EMIT_DEPRECATED_DEFAULT_PROPS,
   }) => {
     const defaultProps = SVG_DEFAULT_PROPS_CODE
-      ? 'var props = objectAssign({}, SVG_DEFAULT_PROPS_CODE, overrides);'
+      ? 'var props = objectAssignShim()({}, SVG_DEFAULT_PROPS_CODE, overrides);'
       : '';
     const PROPS_NAME = SVG_DEFAULT_PROPS_CODE ? 'overrides' : 'props';
 
@@ -164,10 +164,10 @@ export default declare(({
             throw new TypeError('the "filename" option is required when transforming code');
           }
 
-          if (!path.scope.hasBinding('object.assign/implementation')) {
+          if (!path.scope.hasBinding('object.assign/shim')) {
             const assignDeclaration = t.importDeclaration([
-              t.importDefaultSpecifier(t.identifier('objectAssign')),
-            ], t.stringLiteral('object.assign/implementation'));
+              t.importDefaultSpecifier(t.identifier('objectAssignShim')),
+            ], t.stringLiteral('object.assign/shim'));
 
             file.set('ensureObjectAssign', () => {
               const [newPath] = path.unshiftContainer('body', assignDeclaration);
diff --git a/test/sanity.js b/test/sanity.js
index 8bac918..50b6cba 100644
--- a/test/sanity.js
+++ b/test/sanity.js
@@ -19,8 +19,8 @@ function assertMatchImport(name, matchRegex) {
 const assertReactImport = assertMatchImport('React', () => /import React from ['"]react['"]/g);
 
 const assertObjectAssignImport = assertMatchImport(
-  'object.assign/implementation',
-  () => /import objectAssign from ['"]object.assign\/implementation['"]/g,
+  'object.assign/shim',
+  () => /import objectAssignShim from ['"]object.assign\/shim['"]/g,
 );
 
 function assertDefaultProps(shouldExist, result) {