diff --git a/index.d.ts b/index.d.ts
index c9099b28..01e9d8dc 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -65,7 +65,7 @@ declare namespace tocbot {
     scrollSmoothOffset?: number;
 
     // Callback for scroll end.
-    scrollEndCallback?(e: MouseWheelEvent): void;
+    scrollEndCallback?(e: WheelEvent): void;
 
     // Headings offset between the headings and the top of the document (this is meant for minor adjustments).
     headingsOffset?: number;