diff --git a/mod/chat/gui_basic/index.php b/mod/chat/gui_basic/index.php
index 09c11fa9930..e8c04d62e67 100644
--- a/mod/chat/gui_basic/index.php
+++ b/mod/chat/gui_basic/index.php
@@ -44,7 +44,7 @@ $context = context_module::instance($cm->id);
 require_login($course, false, $cm);
 require_capability('mod/chat:chat', $context);
 $PAGE->set_pagelayout('base');
-$PAGE->set_popup_notification_allowed(false); // No popup notifications in the chat window
+$PAGE->set_popup_notification_allowed(false);
 
 /// Check to see if groups are being used here
  if ($groupmode = groups_get_activity_groupmode($cm)) {   // Groups are being used
diff --git a/mod/chat/gui_header_js/chatinput.php b/mod/chat/gui_header_js/chatinput.php
index d480fe1a35d..95643c7148f 100644
--- a/mod/chat/gui_header_js/chatinput.php
+++ b/mod/chat/gui_header_js/chatinput.php
@@ -24,6 +24,7 @@ if (!$cm = get_coursemodule_from_instance('chat', $chat->id, $course->id)) {
 }
 
 $PAGE->set_url('/mod/chat/gui_header_js/chatinput.php', array('chat_sid'=>$chat_sid, 'chat_id'=>$chatid));
+$PAGE->set_popup_notification_allowed(false);
 
 //Get the user theme
 $USER = $DB->get_record('user', array('id'=>$chatuser->userid));
diff --git a/mod/chat/gui_header_js/users.php b/mod/chat/gui_header_js/users.php
index 56d9ee6aea4..825f0a7e492 100644
--- a/mod/chat/gui_header_js/users.php
+++ b/mod/chat/gui_header_js/users.php
@@ -9,6 +9,7 @@ $chat_sid   = required_param('chat_sid', PARAM_ALPHANUM);
 $beep       = optional_param('beep', 0, PARAM_INT);  // beep target
 
 $PAGE->set_url('/mod/chat/gui_header_js/users.php', array('chat_sid'=>$chat_sid));
+$PAGE->set_popup_notification_allowed(false);
 
 if (!$chatuser = $DB->get_record('chat_users', array('sid'=>$chat_sid))) {
     print_error('notlogged', 'chat');
diff --git a/mod/chat/gui_sockets/chatinput.php b/mod/chat/gui_sockets/chatinput.php
index d0603c2511d..8a9d8640354 100644
--- a/mod/chat/gui_sockets/chatinput.php
+++ b/mod/chat/gui_sockets/chatinput.php
@@ -8,6 +8,7 @@ require('../lib.php');
 $chat_sid = required_param('chat_sid', PARAM_ALPHANUM);
 
 $PAGE->set_url('/mod/chat/gui_sockets/chatinput.php', array('chat_sid'=>$chat_sid));
+$PAGE->set_popup_notification_allowed(false);
 
 if (!$chatuser = $DB->get_record('chat_users', array('sid'=>$chat_sid))) {
     print_error('notlogged', 'chat');