diff --git a/mod/forum/lib.php b/mod/forum/lib.php
index c4e6c0e1a62..e439f9139e2 100644
--- a/mod/forum/lib.php
+++ b/mod/forum/lib.php
@@ -3956,7 +3956,7 @@ function forum_search_form($course, $search='') {
     $output .= '<fieldset class="invisiblefieldset">';
     $output .= $OUTPUT->help_icon('search');
     $output .= '<label class="accesshide" for="search" >'.get_string('search', 'forum').'</label>';
-    $output .= '<input id="search" name="search" type="text" size="18" value="'.s($search, true).'" alt="search" />';
+    $output .= '<input id="search" name="search" type="text" size="18" value="'.s($search, true).'" />';
     $output .= '<label class="accesshide" for="searchforums" >'.get_string('searchforums', 'forum').'</label>';
     $output .= '<input id="searchforums" value="'.get_string('searchforums', 'forum').'" type="submit" />';
     $output .= '<input name="id" type="hidden" value="'.$course->id.'" />';