diff --git a/src/components/structures/ContextMenu.tsx b/src/components/structures/ContextMenu.tsx
index 332b6cd318..d503e56a6d 100644
--- a/src/components/structures/ContextMenu.tsx
+++ b/src/components/structures/ContextMenu.tsx
@@ -404,17 +404,27 @@ export class ContextMenu extends React.PureComponent<IProps, IState> {
     }
 }
 
+export type ToRightOf = {
+    left: number;
+    top: number;
+    chevronOffset: number;
+};
+
 // Placement method for <ContextMenu /> to position context menu to right of elementRect with chevronOffset
-export const toRightOf = (elementRect: Pick<DOMRect, "right" | "top" | "height">, chevronOffset = 12) => {
+export const toRightOf = (elementRect: Pick<DOMRect, "right" | "top" | "height">, chevronOffset = 12): ToRightOf => {
     const left = elementRect.right + window.pageXOffset + 3;
     let top = elementRect.top + (elementRect.height / 2) + window.pageYOffset;
     top -= chevronOffset + 8; // where 8 is half the height of the chevron
     return { left, top, chevronOffset };
 };
 
+export type AboveLeftOf = IPosition & {
+    chevronFace: ChevronFace;
+};
+
 // Placement method for <ContextMenu /> to position context menu right-aligned and flowing to the left of elementRect,
 // and either above or below: wherever there is more space (maybe this should be aboveOrBelowLeftOf?)
-export const aboveLeftOf = (elementRect: DOMRect, chevronFace = ChevronFace.None, vPadding = 0) => {
+export const aboveLeftOf = (elementRect: DOMRect, chevronFace = ChevronFace.None, vPadding = 0): AboveLeftOf => {
     const menuOptions: IPosition & { chevronFace: ChevronFace } = { chevronFace };
 
     const buttonRight = elementRect.right + window.pageXOffset;
diff --git a/src/components/views/rooms/MessageComposer.tsx b/src/components/views/rooms/MessageComposer.tsx
index dd6ce10825..506bf09a92 100644
--- a/src/components/views/rooms/MessageComposer.tsx
+++ b/src/components/views/rooms/MessageComposer.tsx
@@ -32,6 +32,7 @@ import {
     ContextMenu,
     useContextMenu,
     MenuItem,
+    AboveLeftOf,
 } from "../../structures/ContextMenu";
 import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
 import ReplyPreview from "./ReplyPreview";
@@ -511,7 +512,7 @@ export default class MessageComposer extends React.Component<IProps, IState> {
                 null,
         ];
 
-        let menuPosition;
+        let menuPosition: AboveLeftOf | undefined;
         if (this.ref.current) {
             const contentRect = this.ref.current.getBoundingClientRect();
             menuPosition = aboveLeftOf(contentRect);