diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/views/argument/IndexTid.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/views/argument/IndexTid.php
index f51a5ce..a492615 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/views/argument/IndexTid.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/views/argument/IndexTid.php
@@ -35,7 +35,7 @@ public function buildOptionsForm(&$form, &$form_state) {
     );
   }
 
-  function set_breadcrumb(&$breadcrumb) {
+  public function setBreadcrumb(&$breadcrumb) {
     if (empty($this->options['set_breadcrumb']) || !is_numeric($this->argument)) {
       return;
     }
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/views/argument/IndexTidDepth.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/views/argument/IndexTidDepth.php
index 7c5a0eb..669f004 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/views/argument/IndexTidDepth.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/views/argument/IndexTidDepth.php
@@ -69,7 +69,7 @@ public function buildOptionsForm(&$form, &$form_state) {
     parent::buildOptionsForm($form, $form_state);
   }
 
-  function set_breadcrumb(&$breadcrumb) {
+  public function setBreadcrumb(&$breadcrumb) {
     if (empty($this->options['set_breadcrumb']) || !is_numeric($this->argument)) {
       return;
     }
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/argument/ArgumentPluginBase.php b/core/modules/views/lib/Drupal/views/Plugin/views/argument/ArgumentPluginBase.php
index f9dcaee..b038008 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/argument/ArgumentPluginBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/argument/ArgumentPluginBase.php
@@ -84,7 +84,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
    * The breadcrumb will be in the form of an array, with the keys being
    * the path and the value being the already sanitized title of the path.
    */
-  function set_breadcrumb(&$breadcrumb) { }
+  public function setBreadcrumb(&$breadcrumb) { }
 
   /**
    * Determine if the argument can generate a breadcrumb
diff --git a/core/modules/views/lib/Drupal/views/ViewExecutable.php b/core/modules/views/lib/Drupal/views/ViewExecutable.php
index b4f76c2..1a84239 100644
--- a/core/modules/views/lib/Drupal/views/ViewExecutable.php
+++ b/core/modules/views/lib/Drupal/views/ViewExecutable.php
@@ -900,7 +900,7 @@ protected function _buildArguments() {
         }
 
         // Allow the argument to muck with this breadcrumb.
-        $argument->set_breadcrumb($this->build_info['breadcrumb']);
+        $argument->setBreadcrumb($this->build_info['breadcrumb']);
 
         // Test to see if we should use this argument's title
         if (!empty($argument->options['title_enable']) && !empty($argument->options['title'])) {