diff --git a/apps/client/src/common/components/view-params-editor/constants.ts b/apps/client/src/common/components/view-params-editor/constants.ts
index be4a2cc70b..626b824ee8 100644
--- a/apps/client/src/common/components/view-params-editor/constants.ts
+++ b/apps/client/src/common/components/view-params-editor/constants.ts
@@ -2,11 +2,14 @@ import { CustomFields } from 'ontime-types';
 
 import type { ParamField } from './types';
 
-export const makeOptionsFromCustomFields = (customFields: CustomFields, additionalOptions?: Record<string, string>) => {
-  const customFieldOptions = Object.entries(customFields).reduce((acc, [key, value]) => {
-    return { ...acc, [`custom-${key}`]: `Custom: ${value.label}` };
-  }, additionalOptions ?? {});
-  return customFieldOptions;
+export const makeOptionsFromCustomFields = (
+  customFields: CustomFields,
+  additionalOptions: Record<string, string> = {},
+) => {
+  return Object.entries(customFields).reduce((options, [key, value]) => {
+    options[`custom-${key}`] = `Custom: ${value.label}`;
+    return options;
+  }, additionalOptions);
 };
 
 export const getTimeOption = (timeFormat: string): ParamField => {
diff --git a/apps/client/src/features/operator/operator.options.tsx b/apps/client/src/features/operator/operator.options.tsx
index df32091360..203bddcd8e 100644
--- a/apps/client/src/features/operator/operator.options.tsx
+++ b/apps/client/src/features/operator/operator.options.tsx
@@ -6,8 +6,11 @@ import { ViewOption } from '../../common/components/view-params-editor/types';
 export const getOperatorOptions = (customFields: CustomFields, timeFormat: string): ViewOption[] => {
   const fieldOptions = makeOptionsFromCustomFields(customFields, { title: 'Title', note: 'Note' });
 
-  const customFieldSelect = Object.entries(customFields).reduce((acc, [key, field]) => {
-    return { ...acc, [key]: { value: key, label: field.label, colour: field.colour } };
+  const customFieldSelect = Object.entries(customFields).reduce<
+    Record<string, { value: string; label: string; colour: string }>
+  >((acc, [key, field]) => {
+    acc[key] = { value: key, label: field.label, colour: field.colour };
+    return acc;
   }, {});
 
   return [