diff --git a/lib/6to5/types/index.js b/lib/6to5/types/index.js
index da3049351f..3c0cba5d62 100644
--- a/lib/6to5/types/index.js
+++ b/lib/6to5/types/index.js
@@ -117,6 +117,8 @@ t.getIds = function (node, map) {
       search = search.concat(id.declarations);
     } else if (t.isVariableDeclarator(id)) {
       search.push(id.id);
+    } else if (t.isSpreadElement(id)) {
+      search.push(id.argument);
     } else if (id) {
       throw new Error("unknown node " + id.type);
     }