diff --git a/packages/babel-helper-remap-async-to-generator/src/index.js b/packages/babel-helper-remap-async-to-generator/src/index.js
index 8a08e58ec4..a8ba68f0be 100644
--- a/packages/babel-helper-remap-async-to-generator/src/index.js
+++ b/packages/babel-helper-remap-async-to-generator/src/index.js
@@ -62,6 +62,8 @@ function plainFunction(path: NodePath, callId: Object) {
   let retFunction = container.body.body[1].argument;
 
   if (path.isFunctionDeclaration()) {
+    node.type = "FunctionExpression";
+
     let declar = t.variableDeclaration("let", [
       t.variableDeclarator(
         t.identifier(asyncFnId.name),