diff --git a/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUrl.php b/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUrl.php
index 7940c97..7436a3f 100644
--- a/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUrl.php
+++ b/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUrl.php
@@ -100,10 +100,11 @@ public function getLangcode(Request $request = NULL) {
    */
   public function processInbound($path, Request $request) {
     $config = $this->config->get('language.negotiation')->get('url');
-    $parts = explode('/', trim($path, '/'));
-    $prefix = array_shift($parts);
 
     if ($config['source'] == LanguageNegotiationUrl::CONFIG_PATH_PREFIX) {
+      $parts = explode('/', trim($path, '/'));
+      $prefix = array_shift($parts);
+
       // Search prefix within added languages.
       foreach ($this->languageManager->getLanguages() as $language) {
         if (isset($config['prefixes'][$language->getId()]) && $config['prefixes'][$language->getId()] == $prefix) {