diff --git a/types/react-aria-modal/index.d.ts b/types/react-aria-modal/index.d.ts
index 4083d08473..e1c0f294d7 100644
--- a/types/react-aria-modal/index.d.ts
+++ b/types/react-aria-modal/index.d.ts
@@ -1,6 +1,7 @@
 // Type definitions for react-aria-modal 2.12
 // Project: https://github.com/davidtheclark/react-aria-modal#readme
 // Definitions by: forabi <https://github.com/forabi>
+//                 dkrk <https://github.com/grgr-dkrk>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
 
@@ -165,6 +166,12 @@ export interface AriaModalProps {
     onExit(): any;
 }
 
-export default class AriaModal extends React.PureComponent<AriaModalProps> {
+/**
+ * This difinition is for require one parameter of 'titleId' or 'title' (and not both) on AriaModal props.
+ */
+export type RequiredAriaTypes<T = Pick<AriaModalProps, 'titleId'>, U = Pick<AriaModalProps, 'titleText'>> =
+    { [K in keyof T]-? : T[K] } & { [P in keyof U]: never} | { [X in keyof T]: never } & { [Y in keyof U]-?: U[Y]};
+
+export default class AriaModal extends React.PureComponent<AriaModalProps & RequiredAriaTypes> {
     static renderTo(node: HTMLElement | string): void;
 }
diff --git a/types/react-aria-modal/react-aria-modal-tests.tsx b/types/react-aria-modal/react-aria-modal-tests.tsx
index c8c9de62d4..d0a13428a9 100644
--- a/types/react-aria-modal/react-aria-modal-tests.tsx
+++ b/types/react-aria-modal/react-aria-modal-tests.tsx
@@ -7,8 +7,8 @@ declare const appContainer: HTMLElement;
 const onExit = () => {};
 
 render(
-    <AriaModal onExit={onExit} underlayClickExits>
-        Hello world
+    <AriaModal onExit={onExit} titleId="describedby" underlayClickExits>
+        <p id="describedby">Hello world</p>
     </AriaModal>,
     appContainer
 );