Index: includes/extend/buddypress/group.php
===================================================================
--- includes/extend/buddypress/group.php	(revision 4771)
+++ includes/extend/buddypress/group.php	(working copy)
@@ -608,7 +608,7 @@

 		// Always load up the group forum
 		bbp_has_forums( array(
-			'ID'          => $forum_id,
+			'p'           => $forum_id,
 			'post_parent' => null
 		) );