diff --git a/blocks/online_users/block_online_users.php b/blocks/online_users/block_online_users.php
index 2efe9a276c5..77f8a69b749 100644
--- a/blocks/online_users/block_online_users.php
+++ b/blocks/online_users/block_online_users.php
@@ -151,12 +151,13 @@ class block_online_users extends block_base {
                 $timeago = format_time($now - $user->lastaccess); //bruno to calculate correctly on frontpage
 
                 if (isguestuser($user)) {
-                    $this->content->text .= '<div class="user">'.$OUTPUT->user_picture($user, array('size'=>16));
+                    $this->content->text .= '<div class="user">'.$OUTPUT->user_picture($user, array('size'=>16, 'alttext'=>false));
                     $this->content->text .= get_string('guestuser').'</div>';
 
                 } else {
-                    $this->content->text .= '<div class="user">'.$OUTPUT->user_picture($user, array('size'=>16));
-                    $this->content->text .= '<a href="'.$CFG->wwwroot.'/user/view.php?id='.$user->id.'&amp;course='.$this->page->course->id.'" title="'.$timeago.'">'.$user->fullname.'</a></div>';
+                    $this->content->text .= '<div class="user">';
+                    $this->content->text .= '<a href="'.$CFG->wwwroot.'/user/view.php?id='.$user->id.'&amp;course='.$this->page->course->id.'" title="'.$timeago.'">';
+                    $this->content->text .= $OUTPUT->user_picture($user, array('size'=>16, 'alttext'=>false, 'link'=>false)) .$user->fullname.'</a></div>';
                 }
                 if ($canshowicon and ($USER->id != $user->id) and !isguestuser($user)) {  // Only when logged in and messaging active etc
                     $anchortagcontents = '<img class="iconsmall" src="'.$OUTPUT->pix_url('t/message') . '" alt="'. get_string('messageselectadd') .'" />';