diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..f02a386
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,15 @@
+  Ryudo is free software, and is Copyright (c) 2019-20022 Derek Stevens,
+  2004 by Russ Cox, and 1994-1996 by David Hogan.  Permission is granted
+  to all sentient beings to use this software, to make copies of it,
+  and to distribute those copies, provided that:
+
+      (1) the copyright and licence notices are left intact (2) the
+      recipients are aware that it is free software (3) any unapproved
+      changes in functionality are either
+            (i) only distributed as patches
+        or (ii) distributed as a new program which is not called 9wm
+                and whose documentation gives credit where it is due
+      (4) the author is not held responsible for any defects
+          or shortcomings in the software, or damages caused by it.
+
+  There is no warranty for this software.  Have a nice day.