diff --git a/packages/create-react-app/createReactApp.js b/packages/create-react-app/createReactApp.js
index da9250d4d71..4bfd9171633 100755
--- a/packages/create-react-app/createReactApp.js
+++ b/packages/create-react-app/createReactApp.js
@@ -501,6 +501,9 @@ function isSafeToCreateProjectIn(root) {
     'README.md',
     'LICENSE',
     'web.iml',
+    '.hg',
+    '.hgignore',
+    '.hgcheck',
   ];
   return fs.readdirSync(root).every(file => validFiles.indexOf(file) >= 0);
 }