diff --git a/packages/element-web-module-api/element-web-module-api.api.md b/packages/element-web-module-api/element-web-module-api.api.md
index ce5f5e8ea5..81fd045f8f 100644
--- a/packages/element-web-module-api/element-web-module-api.api.md
+++ b/packages/element-web-module-api/element-web-module-api.api.md
@@ -78,7 +78,7 @@ originalComponent?: (props?: OriginalComponentProps) => React.JSX.Element) => JS
 // @alpha
 export type CustomMessageRenderHints = {
     allowEditingEvent?: boolean;
-    allowDownloadingMedia?: boolean | Promise<boolean>;
+    allowDownloadingMedia?: (mxEvent: MatrixEvent) => Promise<boolean>;
 };
 
 // @alpha @deprecated (undocumented)