diff --git a/src/app/ui/input_chain.h b/src/app/ui/input_chain.h
index b303992eb..6f62201c6 100644
--- a/src/app/ui/input_chain.h
+++ b/src/app/ui/input_chain.h
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2001-2015  David Capello
+// Copyright (C) 2001-2016  David Capello
 //
 // This program is free software; you can redistribute it and/or modify
 // it under the terms of the GNU General Public License version 2 as
@@ -11,6 +11,8 @@
 
 #include "base/observable.h"
 
+#include <vector>
+
 namespace app {
 
   class Context;