diff --git a/typescript/core/utils/events/wheelhandler.ts b/typescript/core/utils/events/wheelhandler.ts
index ca4e8f1929..85b3a6c01f 100644
--- a/typescript/core/utils/events/wheelhandler.ts
+++ b/typescript/core/utils/events/wheelhandler.ts
@@ -1,4 +1,10 @@
 export declare class WheelHandler {
+  constructor(
+      onWheel: (deltaX: number, deltaY: number) => void,
+      handleScrollX?: boolean | ((deltaX: number, deltaY: number) => boolean),
+      handleScrollY?: boolean | ((deltaY: number, deltaX: number) => boolean),
+      stopPropagation?: boolean | (() => void)
+  );
   onWheel(event: WheelEvent): void
   _didWheel(): void
 }
\ No newline at end of file