diff --git a/modules/configuration/ajax/process.php b/modules/configuration/ajax/process.php
index 3645c6d0662..7c3e81fe9f5 100644
--- a/modules/configuration/ajax/process.php
+++ b/modules/configuration/ajax/process.php
@@ -41,7 +41,7 @@
                     $err = 'Path ' . htmlspecialchars($value, ENT_QUOTES)
                         . ' is not valid.';
                     // Set response code and display error message.
-                    $displayError(400, $err);
+                    displayError(400, $err);
                     return;
                 }
                 if (!is_readable($value)) {