Index: LICENSE
==================================================================
--- LICENSE
+++ LICENSE
@@ -1,4 +1,7 @@
 Free Hero Mesh is released to public domain.
 
 Puzzle sets may have their own copyright which might or might not differ
 from that of the Free Hero Mesh program itself.
+
+SDL1 is licensed by GNU LGPL. This means that if you redistribute Free
+Hero Mesh with SDL1, then you must follow that license.