diff --git a/types/moment-duration-format/index.d.ts b/types/moment-duration-format/index.d.ts
index 41b36bc34d..76eb839cbd 100644
--- a/types/moment-duration-format/index.d.ts
+++ b/types/moment-duration-format/index.d.ts
@@ -15,7 +15,7 @@ declare module "moment" {
     interface DurationFormatSettings {
         template?: string;
         precision?: number;
-        trim?: boolean;
+        trim?: boolean | "right";
         forceLength?: boolean;
     }
 }