* E_STRICT

diff --git a/includes/SpecialBooksources.php b/includes/SpecialBooksources.php
index d3136ea..1903a8a 100644 (file)
--- a/includes/SpecialBooksources.php
+++ b/includes/SpecialBooksources.php
@@ -27,7 +27,7 @@ class SpecialBookSources extends SpecialPage {
         *
         * @param $isbn ISBN passed as a subpage parameter
         */
-       public function execute( $isbn = false ) {
+       public function execute( $isbn ) {
                global $wgOut, $wgRequest;
                $this->setHeaders();
                $this->isbn = $this->cleanIsbn( $isbn ? $isbn : $wgRequest->getText( 'isbn' ) );