diff --git a/mod/chat/lib.php b/mod/chat/lib.php
index 026b7f6ab4f..426039f6716 100644
--- a/mod/chat/lib.php
+++ b/mod/chat/lib.php
@@ -345,7 +345,7 @@ function chat_print_recent_activity($course, $viewfullnames, $timestart) {
 
         $params = array('timeold'=>$timeold, 'timeoldext'=>$timeoldext, 'cmid'=>$cm->id);
 
-        $timeout = "AND (chu.version<>'basic' AND chu.lastping>:timeold) OR (chu.version='basic' AND chu.lastping>:timeoldext)";
+        $timeout = "AND ((chu.version<>'basic' AND chu.lastping>:timeold) OR (chu.version='basic' AND chu.lastping>:timeoldext))";
 
         foreach ($current as $cm) {
             //count users first