diff --git a/distribution/openrct2.d.ts b/distribution/openrct2.d.ts
index febc79ba21..219ee8ead4 100644
--- a/distribution/openrct2.d.ts
+++ b/distribution/openrct2.d.ts
@@ -672,7 +672,7 @@ declare global {
 
     interface CheckboxWidget extends Widget {
         text: string;
-        isChecked: number;
+        isChecked: boolean;
         onChanged: (isChecked: boolean) => void;
     }