diff --git a/lib/sequence/index.js b/lib/sequence/index.js
index a134ea3..e071336 100644
--- a/lib/sequence/index.js
+++ b/lib/sequence/index.js
@@ -48,7 +48,7 @@ sequence.stop = function (next) {
 	sequence._state.count = 0
 	sequence._loop.count = 0
 	console.dir(sequence._state.stop)
-	next()
+	if (next) next()
 }
 
 sequence.pause = function () {