diff --git a/src/formatter/formatReactElementNode.js b/src/formatter/formatReactElementNode.js
index 4e2d5820c..bcae0165d 100644
--- a/src/formatter/formatReactElementNode.js
+++ b/src/formatter/formatReactElementNode.js
@@ -203,7 +203,7 @@ export default (
       out += '\n';
       out += spacer(newLvl - 1, tabStop);
     }
-    out += `</${displayName}>`;
+    out += `</${displayName.toString()}>`;
   } else {
     if (
       !isInlineAttributeTooLong(