diff --git a/bookquiz/toc.php b/bookquiz/toc.php
index 9f146df..8c59d67 100755
--- a/bookquiz/toc.php
+++ b/bookquiz/toc.php
@@ -132,7 +132,7 @@ if ($print) {
             } else {
                 if (array_key_exists( $ch->id, $okchapters)) {
                     $toc .= '<a title="'.htmlspecialchars($title).'" href="attempt.php?id='
-                        $id.'&chapterid='.$ch->id.'">'.$title.'</a>';
+                        .$id.'&chapterid='.$ch->id.'">'.$title.'</a>';
                 } else {
                     $toc .= htmlspecialchars($title);
                 }