1 files changed, 2 insertions, 1 deletions
diff --git a/cli/dts/lib.es2015.iterable.d.ts b/cli/dts/lib.es2015.iterable.d.ts
index d6907b894..8a7292383 100644
--- a/cli/dts/lib.es2015.iterable.d.ts
+++ b/cli/dts/lib.es2015.iterable.d.ts
@@ -157,7 +157,8 @@ interface ReadonlyMap<K, V> {
 }
 
 interface MapConstructor {
-    new <K, V>(iterable: Iterable<readonly [K, V]>): Map<K, V>;
+    new(): Map<any, any>;
+    new <K, V>(iterable?: Iterable<readonly [K, V]> | null): Map<K, V>;
 }
 
 interface WeakMap<K extends object, V> { }