diff --git a/types/luxon/index.d.ts b/types/luxon/index.d.ts
index eebf89497d..44165c06c3 100644
--- a/types/luxon/index.d.ts
+++ b/types/luxon/index.d.ts
@@ -426,7 +426,7 @@ export class Interval {
     engulfs(other: Interval): boolean;
     equals(other: Interval): boolean;
     hasSame(unit: DurationUnit): boolean;
-    intersection(other: Interval): Interval;
+    intersection(other: Interval): Interval | null;
     isAfter(dateTime: DateTime): boolean;
     isBefore(dateTime: DateTime): boolean;
     isEmpty(): boolean;
diff --git a/types/luxon/luxon-tests.ts b/types/luxon/luxon-tests.ts
index 59566c35c3..ecf49e2081 100644
--- a/types/luxon/luxon-tests.ts
+++ b/types/luxon/luxon-tests.ts
@@ -140,6 +140,7 @@ i.length('years'); // $ExpectType number
 i.contains(DateTime.local(2019)); // $ExpectType boolean
 i.set({end: DateTime.local(2020)}); // $ExpectType Interval
 i.mapEndpoints((d) => d); // $ExpectType Interval
+i.intersection(i); // $ExpectType Interval | null
 
 i.toISO(); // $ExpectType string
 i.toString(); // $ExpectType string