diff --git a/core/api.txt b/core/api.txt
index 14cb78051c..0355023b86 100644
--- a/core/api.txt
+++ b/core/api.txt
@@ -663,7 +663,7 @@ ion-menu-controller,method,isAnimating,isAnimating() => Promise<boolean>
 ion-menu-controller,method,isEnabled,isEnabled(menu?: string | null | undefined) => Promise<boolean>
 ion-menu-controller,method,isOpen,isOpen(menu?: string | null | undefined) => Promise<boolean>
 ion-menu-controller,method,open,open(menu?: string | null | undefined) => Promise<boolean>
-ion-menu-controller,method,registerAnimation,registerAnimation(name: string, animation: AnimationBuilder) => Promise<void>
+ion-menu-controller,method,registerAnimation,registerAnimation(name: string, animation: AnimationBuilder | ((menu: MenuI) => IonicAnimation)) => Promise<void>
 ion-menu-controller,method,swipeGesture,swipeGesture(enable: boolean, menu?: string | null | undefined) => Promise<HTMLIonMenuElement | undefined>
 ion-menu-controller,method,toggle,toggle(menu?: string | null | undefined) => Promise<boolean>
 
diff --git a/core/src/components.d.ts b/core/src/components.d.ts
index ba2d75280f..6600297cc7 100644
--- a/core/src/components.d.ts
+++ b/core/src/components.d.ts
@@ -1389,7 +1389,7 @@ export namespace Components {
     /**
     * Registers a new animation that can be used with any `ion-menu` by passing the name of the animation in its `type` property.
     */
-    'registerAnimation': (name: string, animation: ((menu: MenuI) => IonicAnimation) | AnimationBuilder) => Promise<void>;
+    'registerAnimation': (name: string, animation: AnimationBuilder | ((menu: MenuI) => IonicAnimation)) => Promise<void>;
     /**
     * Enable or disable the ability to swipe open the menu.
     */
diff --git a/core/src/components/menu-controller/readme.md b/core/src/components/menu-controller/readme.md
index 351268b9bc..f51a9fe48a 100644
--- a/core/src/components/menu-controller/readme.md
+++ b/core/src/components/menu-controller/readme.md
@@ -116,7 +116,7 @@ Type: `Promise<boolean>`
 
 
 
-### `registerAnimation(name: string, animation: AnimationBuilder) => Promise<void>`
+### `registerAnimation(name: string, animation: AnimationBuilder | ((menu: MenuI) => IonicAnimation)) => Promise<void>`
 
 Registers a new animation that can be used with any `ion-menu` by
 passing the name of the animation in its `type` property.