diff -u b/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php b/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
--- b/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
+++ b/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
@@ -69,7 +69,7 @@
    *   The user-entered string.
    *
    * @return string
-   *   The URI, if a non-empty $uri was passed.
+   *   The URI, if a non-empty $string was passed.
    */
   protected static function getUserEnteredStringAsUri($string) {
     if (!empty($string)) {