diff --git a/moment/moment-node.d.ts b/moment/moment-node.d.ts
index 13f1b9362e..ba5fe85d16 100644
--- a/moment/moment-node.d.ts
+++ b/moment/moment-node.d.ts
@@ -465,7 +465,8 @@ declare module moment {
         max(moments: Moment[]): Moment;
 
         normalizeUnits(unit: string): string;
-        relativeTimeThreshold(threshold: string, limit: number): void;
+        relativeTimeThreshold(threshold: string): number|boolean;
+        relativeTimeThreshold(threshold: string, limit:number): boolean;
 
         /**
          * Constant used to enable explicit ISO_8601 format parsing.