diff --git a/frontend/main.ts b/frontend/main.ts
index fc4a377..5a7bc92 100644
--- a/frontend/main.ts
+++ b/frontend/main.ts
@@ -425,8 +425,8 @@ function initNewChoice(select: HTMLInputElement) {
     maxItemText: (maxItemCount) => {
       return `Nur ${maxItemCount} Ruderer können hinzugefügt werden`;
     },
-    callbackOnInit: function () {
-      this._currentState.items.forEach(function (obj) {
+    callbackOnInit: function (this: Choices) {
+      this._currentState.items.forEach(function (obj: any) {
         if (boat_in_ottensheim && obj.customProperties) {
           if (obj.customProperties.is_racing) {
             const coxSelect = <HTMLSelectElement>(