diff --git a/source/application.cpp b/source/application.cpp
index 9ed9145..bb6cc57 100644
--- a/source/application.cpp
+++ b/source/application.cpp
@@ -1872,7 +1872,7 @@ namespace gmtk
 
 			map_.world->apply<vertex const, transformer>([&](vertex const & v, transformer & t)
 			{
-				boost::container::flat_multimap<resource_type, location> has_inputs;
+				std::multimap<resource_type, location> has_inputs;
 
 				auto c = v.location.down();
 				auto ce = map_.world->index<path_index>().get(c);