diff --git a/lib/6to5/transformation/transformers/_property-literals.js b/lib/6to5/transformation/transformers/_property-literals.js
index f37c284b7f..dff7244d1d 100644
--- a/lib/6to5/transformation/transformers/_property-literals.js
+++ b/lib/6to5/transformation/transformers/_property-literals.js
@@ -7,9 +7,8 @@ exports.Property = function (node) {
     // property key is a literal but a valid identifier
     node.key = t.identifier(key.value);
     node.computed = false;
-  } else if (t.isIdentifier(key) && esutils.keyword.isKeywordES6(key.name, true)) {
+  } else if (!node.computed && t.isIdentifier(key) && esutils.keyword.isKeywordES6(key.name, true)) {
     // property key is a keyword
     node.key = t.literal(key.name);
-    node.computed = true;
   }
 };