diff --git a/lib/lib.dom.iterable.d.ts b/lib/lib.dom.iterable.d.ts
index 4914c210227f0..a0df8ec594602 100644
--- a/lib/lib.dom.iterable.d.ts
+++ b/lib/lib.dom.iterable.d.ts
@@ -133,3 +133,10 @@ interface URLSearchParams {
      */
     [Symbol.iterator](): IterableIterator<[string, string]>;
 }
+
+declare var URLSearchParams: {
+  /**
+   * Constructor returning a URLSearchParams object.
+   */
+  new (init?: string | URLSearchParams | Iterable<[string, string]>): URLSearchParams;
+};