diff --git a/libraries/stdlib/src/kotlin/dom/Dom.kt b/libraries/stdlib/src/kotlin/dom/Dom.kt
index fa9cefb499d..708b96584be 100644
--- a/libraries/stdlib/src/kotlin/dom/Dom.kt
+++ b/libraries/stdlib/src/kotlin/dom/Dom.kt
@@ -208,7 +208,7 @@ public fun Node.removeFromParent() {
     parentNode?.removeChild(this)
 }
 
-private class NodeListAsList(val delegate: NodeList) : AbstractList<Node>() {
+private class NodeListAsList(private val delegate: NodeList) : AbstractList<Node>() {
     override fun size(): Int = delegate.length
 
     override fun get(index: Int): Node = when {