diff --git a/lib/6to5/transformation/transformers/es6-arrow-functions.js b/lib/6to5/transformation/transformers/es6-arrow-functions.js
index 80a45e573b..40f9ab9906 100644
--- a/lib/6to5/transformation/transformers/es6-arrow-functions.js
+++ b/lib/6to5/transformation/transformers/es6-arrow-functions.js
@@ -3,7 +3,7 @@ var t = require("../../types");
 exports.ArrowFunctionExpression = function (node) {
   t.ensureBlock(node);
 
-  node._aliasFunction = true;
+  node._aliasFunction = "arrow";
   node.expression = false;
   node.type = "FunctionExpression";
 
diff --git a/lib/6to5/transformation/transformers/es6-rest-parameters.js b/lib/6to5/transformation/transformers/es6-rest-parameters.js
index 060259a94b..0d67a8b261 100644
--- a/lib/6to5/transformation/transformers/es6-rest-parameters.js
+++ b/lib/6to5/transformation/transformers/es6-rest-parameters.js
@@ -14,7 +14,7 @@ exports.Function = function (node, parent, file) {
     call.arguments.push(t.literal(node.params.length));
   }
 
-  if (!node._aliasFunction) call._ignoreAliasFunctions = true;
+  if (!node._aliasFunction || node._aliasFunction === "arrow") call._ignoreAliasFunctions = true;
 
   node.body.body.unshift(t.variableDeclaration("var", [
     t.variableDeclarator(rest, call)