Index: bp-groups.php
===================================================================
--- bp-groups.php	(revision 3230)
+++ bp-groups.php	(working copy)
@@ -1650,9 +1650,9 @@
 	bp_core_delete_all_notifications_by_type( $group_id, $bp->groups->slug );
 
 	// Remove forum if component is active and current group has one
-	if ( function_exists( 'bp_forums_setup' ) && $group->enable_forum ) {
+	if ( bp_is_active( 'forums' ) && $forum_id = groups_get_groupmeta( $group_id, 'forum_id' ) ) {
 		do_action( 'bbpress_init' );
-		bb_delete_forum( groups_get_groupmeta( $group_id, 'forum_id' ) );
+		bb_delete_forum( $forum_id );
 	}
 
 	do_action( 'groups_delete_group', $group_id);