is_subscribed => forum_is_subscribed

diff --git a/course/social.php b/course/social.php
index 56584da80d81a3c39572666484c4c243d0ef806b..61cfada5c2b937c3b8dd5db3223dc06805f65177 100644 (file)
--- a/course/social.php
+++ b/course/social.php
@@ -82,7 +82,7 @@
       }
 
       $SESSION->fromdiscussion = "$CFG->wwwdir/course/view.php?id=$course->id";
-      if (is_subscribed($USER->id, $social->id)) {
+      if (forum_is_subscribed($USER->id, $social->id)) {
           $subtext = "Unsubscribe";
       } else {
           $subtext = "Subscribe me by mail";