diff --git a/archimedean.cpp b/archimedean.cpp
index 905c74a7..4897b8b3 100644
--- a/archimedean.cpp
+++ b/archimedean.cpp
@@ -1,3 +1,7 @@
+// Hyperbolic Rogue
+// This file implements the 'Archimedean tilings' geometry.
+// Copyright (C) 2011-2018 Zeno Rogue, see 'hyper.cpp' for details
+
 namespace hr {
 
 namespace arcm {