diff --git a/api-reports/2_12.txt b/api-reports/2_12.txt
index 45b5aac0..80e5fbb2 100644
--- a/api-reports/2_12.txt
+++ b/api-reports/2_12.txt
@@ -27196,7 +27196,7 @@ URL[JC] var pathname: String
 URL[JC] var port: String
 URL[JC] var protocol: String
 URL[JC] var search: String
-URL[JC] var searchParams: URLSearchParams
+URL[JC] val searchParams: URLSearchParams
 URL[JC] var username: String
 URL[JO] def createObjectURL(blob: Blob): String
 URL[JO] def createObjectURL(src: MediaSource): String
diff --git a/api-reports/2_13.txt b/api-reports/2_13.txt
index 45b5aac0..80e5fbb2 100644
--- a/api-reports/2_13.txt
+++ b/api-reports/2_13.txt
@@ -27196,7 +27196,7 @@ URL[JC] var pathname: String
 URL[JC] var port: String
 URL[JC] var protocol: String
 URL[JC] var search: String
-URL[JC] var searchParams: URLSearchParams
+URL[JC] val searchParams: URLSearchParams
 URL[JC] var username: String
 URL[JO] def createObjectURL(blob: Blob): String
 URL[JO] def createObjectURL(src: MediaSource): String
diff --git a/dom/src/main/scala/org/scalajs/dom/URL.scala b/dom/src/main/scala/org/scalajs/dom/URL.scala
index aea3f393..5a13a48a 100644
--- a/dom/src/main/scala/org/scalajs/dom/URL.scala
+++ b/dom/src/main/scala/org/scalajs/dom/URL.scala
@@ -62,5 +62,5 @@ class URL(url: String, base: String = js.native) extends js.Object {
   /** Is a DOMString containing a '#' followed by the fragment identifier of the URL. */
   var hash: String = js.native
 
-  var searchParams: URLSearchParams = js.native
+  val searchParams: URLSearchParams = js.native
 }