diff --git a/core/lib/Drupal/Core/Extension/ThemeHandler.php b/core/lib/Drupal/Core/Extension/ThemeHandler.php
index 168de85..957417c 100644
--- a/core/lib/Drupal/Core/Extension/ThemeHandler.php
+++ b/core/lib/Drupal/Core/Extension/ThemeHandler.php
@@ -172,7 +172,7 @@ public function setDefault($name) {
    * {@inheritdoc}
    */
   public function install(array $theme_list, $install_dependencies = TRUE) {
-    \Drupal::service('theme_installer')->uninstall($theme_list, $install_dependencies);
+    \Drupal::service('theme_installer')->install($theme_list, $install_dependencies);
   }
 
   /**