diff --git a/src/helpers/time/parseBooleanProp.ts b/src/helpers/time/parseBooleanProp.ts
index 1407fe4e1..b43ecac59 100644
--- a/src/helpers/time/parseBooleanProp.ts
+++ b/src/helpers/time/parseBooleanProp.ts
@@ -1,5 +1,5 @@
-export function parseBooleanProp(booleanProp: string) {
+export function parseBooleanProp(booleanProp: string | undefined) {
 	return (booleanProp === 'false' || booleanProp === '0')
 		? false
-		:	Boolean(booleanProp)
+		: Boolean(booleanProp)
 }
\ No newline at end of file