Index: src/Concurrency/Keywords.cc
===================================================================
--- src/Concurrency/Keywords.cc	(revision 08da53dc33a9524abd5a449278fcad633ee0261c)
+++ src/Concurrency/Keywords.cc	(revision bd41764cef3326642e00d1a72b925ec627f0d2ed)
@@ -553,5 +553,5 @@
 			),
 			new ListInit(
-				map_range < std::list<Initializer*> > ( args, [this](DeclarationWithType * var ){
+				map_range < std::list<Initializer*> > ( args, [](DeclarationWithType * var ){
 					Type * type = var->get_type()->clone();
 					type->set_mutex( false );