diff --git a/libtriangles.scad b/libtriangles.scad
index 40e4876..d5f207e 100644
--- a/libtriangles.scad
+++ b/libtriangles.scad
@@ -1,4 +1,6 @@
-//todo, make library work with negative lengths by adding triangles to the inside of every surface. basicaly copy and paste the current triangles set and reverse the first and last digit of every triangle. In 4 character traingles switcht the middle ones around as well.
+//Copyright (C) 2013 Alex Davies
+//License: LGPL 2.1 or later
+//todo, make library work with negative lengths by adding triangles to the inside of every surface. basicaly copy and paste the current triangles set and reverse the first and last digit of every triangle. In 4 character traingles switcht the middle ones around as well. Not sure if that' actually useful though.
 
 module rightpyramid(rightpyramidx, rightpyramidy, rightpyramidz) {
 	polyhedron ( points = [[0,0,0], 
diff --git a/test_libtriangles.scad b/test_libtriangles.scad
index b58ce56..21b123c 100644
--- a/test_libtriangles.scad
+++ b/test_libtriangles.scad
@@ -1,3 +1,5 @@
+//Copyright (C) 2013 Alex Davies
+//License: LGPL 2.1 or later
 use <libtriangles.scad>;
 
 //all of these follow the (X,Y,Z) syntax