diff --git a/libs/util/include/psemek/util/ecs.hpp b/libs/util/include/psemek/util/ecs.hpp
index 7c74d3b4..63ff8949 100644
--- a/libs/util/include/psemek/util/ecs.hpp
+++ b/libs/util/include/psemek/util/ecs.hpp
@@ -47,7 +47,7 @@ namespace psemek::util
 			template <typename Behavior>
 			void apply(Behavior & behavior)
 			{
-				apply_impl(behavior, typename Behavior::components{});
+				apply_impl(behavior, typename Behavior::component_types{});
 			}
 
 			virtual ~species_base() {}
@@ -216,7 +216,7 @@ namespace psemek::util
 		template <typename ... Components>
 		struct behavior
 		{
-			using components = std::tuple<Components...>;
+			using component_types = std::tuple<Components...>;
 			using component_ptrs = std::tuple<Components *...>;
 		};