diff --git a/moment-range/index.d.ts b/moment-range/index.d.ts
index cf5f823140..b68603450c 100644
--- a/moment-range/index.d.ts
+++ b/moment-range/index.d.ts
@@ -34,7 +34,7 @@ declare module 'moment' {
 
         toString (): string;
 
-        toArray (): Date[];
+        toArray (by: Range|String, exclusive?: boolean): Date[];
 
         valueOf (): number;
 
diff --git a/moment-range/moment-range-tests.ts b/moment-range/moment-range-tests.ts
index b1b5e01c9c..918f9bb1aa 100644
--- a/moment-range/moment-range-tests.ts
+++ b/moment-range/moment-range-tests.ts
@@ -44,3 +44,5 @@ var res18: moment.Moment = range.start;
 var res19: moment.Moment = range.end;
 
 var res20: Date[] = range.toArray();
+var res21: Date[] = range.toArray('days');
+var res22: Date[] = range.toArray('days', true);