diff --git a/packages/gen-typescript-declarations/CHANGELOG.md b/packages/gen-typescript-declarations/CHANGELOG.md
index 2ce6666c7..60a570a7c 100644
--- a/packages/gen-typescript-declarations/CHANGELOG.md
+++ b/packages/gen-typescript-declarations/CHANGELOG.md
@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 <!-- ## [Unreleased] -->
 <!-- Add new, unreleased changes here. -->
 
+## [1.5.1] - 2018-08-25
+* Legacy Polymer function element interfaces are now exported from ES modules.
+
 ## [1.5.0] - 2018-08-15
 * Legacy Polymer function components will no longer have a `_template`
   property.
diff --git a/packages/gen-typescript-declarations/package.json b/packages/gen-typescript-declarations/package.json
index c26a0e5a1..52cf57048 100644
--- a/packages/gen-typescript-declarations/package.json
+++ b/packages/gen-typescript-declarations/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polymer/gen-typescript-declarations",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "description": "Generate TypeScript type declarations for Polymer components.",
   "homepage": "https://github.com/Polymer/tools/tree/master/packages/gen-typescript-declarations",
   "repository": "github:Polymer/tools",
diff --git a/packages/gen-typescript-declarations/src/gen-ts.ts b/packages/gen-typescript-declarations/src/gen-ts.ts
index cca61bf35..4e4954b0f 100644
--- a/packages/gen-typescript-declarations/src/gen-ts.ts
+++ b/packages/gen-typescript-declarations/src/gen-ts.ts
@@ -484,6 +484,12 @@ class TypeGenerator {
           ...legacyPolymerInterfaces,
         ],
       }));
+
+      if (isPolymerElement(feature) && feature.isLegacyFactoryCall &&
+          this.root.isEsModule) {
+        this.root.members.push(
+            new ts.Export({identifiers: [{identifier: shortName}]}));
+      }
     }
 
     // The `HTMLElementTagNameMap` global interface maps custom element tag
diff --git a/packages/gen-typescript-declarations/src/test/goldens/paper-button-3/paper-button.d.ts b/packages/gen-typescript-declarations/src/test/goldens/paper-button-3/paper-button.d.ts
index 497059068..29e016172 100644
--- a/packages/gen-typescript-declarations/src/test/goldens/paper-button-3/paper-button.d.ts
+++ b/packages/gen-typescript-declarations/src/test/goldens/paper-button-3/paper-button.d.ts
@@ -25,6 +25,8 @@ interface PaperButtonElement extends PaperButtonBehavior, LegacyElementMixin, HT
   _calculateElevation(): void;
 }
 
+export {PaperButtonElement};
+
 declare global {
 
   interface HTMLElementTagNameMap {
diff --git a/packages/gen-typescript-declarations/src/test/goldens/paper-menu-button-3/paper-menu-button-animations.d.ts b/packages/gen-typescript-declarations/src/test/goldens/paper-menu-button-3/paper-menu-button-animations.d.ts
index a09eeae04..b36c792af 100644
--- a/packages/gen-typescript-declarations/src/test/goldens/paper-menu-button-3/paper-menu-button-animations.d.ts
+++ b/packages/gen-typescript-declarations/src/test/goldens/paper-menu-button-3/paper-menu-button-animations.d.ts
@@ -18,6 +18,8 @@ interface PaperMenuGrowHeightAnimationElement extends NeonAnimationBehavior, Leg
   configure(config: any): any;
 }
 
+export {PaperMenuGrowHeightAnimationElement};
+
 declare global {
 
   interface HTMLElementTagNameMap {
@@ -32,10 +34,16 @@ interface PaperMenuGrowWidthAnimationElement extends NeonAnimationBehavior, Lega
   configure(config: any): any;
 }
 
+export {PaperMenuGrowWidthAnimationElement};
+
 interface PaperMenuShrinkWidthAnimationElement extends NeonAnimationBehavior, LegacyElementMixin, HTMLElement {
   configure(config: any): any;
 }
 
+export {PaperMenuShrinkWidthAnimationElement};
+
 interface PaperMenuShrinkHeightAnimationElement extends NeonAnimationBehavior, LegacyElementMixin, HTMLElement {
   configure(config: any): any;
 }
+
+export {PaperMenuShrinkHeightAnimationElement};