diff --git a/packages/babel-generator/src/generators/flow.js b/packages/babel-generator/src/generators/flow.js
index b93435ccf5..eb4845ce1c 100644
--- a/packages/babel-generator/src/generators/flow.js
+++ b/packages/babel-generator/src/generators/flow.js
@@ -236,11 +236,7 @@ export function TypeParameter(node: Object) {
 
 export function TypeParameterInstantiation(node: Object) {
   this.token("<");
-  this.printList(node.params, node, {
-    iterator: (node: Object) => {
-      this.print(node.typeAnnotation, node);
-    }
-  });
+  this.printList(node.params, node, {});
   this.token(">");
 }
 
diff --git a/packages/babel-generator/test/fixtures/flow/type-annotations/actual.js b/packages/babel-generator/test/fixtures/flow/type-annotations/actual.js
index 4797cf488e..7410326dea 100644
--- a/packages/babel-generator/test/fixtures/flow/type-annotations/actual.js
+++ b/packages/babel-generator/test/fixtures/flow/type-annotations/actual.js
@@ -100,3 +100,4 @@ export type { foo };
 export type { foo } from "bar";
 export interface foo { p: number };
 export interface foo<T> { p: T };
+var a: ?Array<?string>;
diff --git a/packages/babel-generator/test/fixtures/flow/type-annotations/expected.js b/packages/babel-generator/test/fixtures/flow/type-annotations/expected.js
index 01e4dde409..dd087046a5 100644
--- a/packages/babel-generator/test/fixtures/flow/type-annotations/expected.js
+++ b/packages/babel-generator/test/fixtures/flow/type-annotations/expected.js
@@ -104,3 +104,4 @@ export type { foo };
 export type { foo } from "bar";
 export interface foo { p: number };
 export interface foo<T> { p: T };
+var a: ?Array<?string>;