diff --git a/core/src/utils/overlays.ts b/core/src/utils/overlays.ts
index 29fff9231b..d91f1d9745 100644
--- a/core/src/utils/overlays.ts
+++ b/core/src/utils/overlays.ts
@@ -3,7 +3,14 @@ import { Animation, AnimationBuilder, Config, Mode } from '../interface';
 
 let lastId = 1;
 
-export function createOverlay<T extends HTMLIonOverlayElement & Required<B>, B>
+/**
+ * Convert an interface where all the properties are optional to mandatory.
+ */
+export type Requires<K extends string> = {
+  [P in K]: any;
+};
+
+export function createOverlay<T extends HTMLIonOverlayElement & Requires<keyof B>, B>
 (element: T, opts: B): Promise<T> {
   // convert the passed in overlay options into props
   // that get passed down into the new overlay