Index: src/bp-activity/bp-activity-functions.php
===================================================================
--- src/bp-activity/bp-activity-functions.php	(revision 11266)
+++ src/bp-activity/bp-activity-functions.php	(working copy)
@@ -3761,5 +3761,5 @@
 		$retval = true;
 	}
 
-	return $retval;
+    return apply_filters( 'bp_activity_do_heartbeat', $retval );
 }