diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..ae73dc9
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,25 @@
+Copyright (c) 2011-2020 K. Lange.  All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal with the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+  1. Redistributions of source code must retain the above copyright notice,
+     this list of conditions and the following disclaimers.
+  2. Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimers in the
+     documentation and/or other materials provided with the distribution.
+  3. Neither the names of the Association for Computing Machinery, K.
+     Lange, nor the names of its contributors may be used to endorse
+     or promote products derived from this Software without specific prior
+     written permission.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+WITH THE SOFTWARE.
diff --git a/Makefile b/Makefile
index 069b06c..d50ed2a 100644
--- a/Makefile
+++ b/Makefile
@@ -19,6 +19,7 @@ $(distdir): FORCE
 	cp src/nyancat.c $(distdir)/src
 	cp src/animation.c $(distdir)/src
 	cp src/telnet.h $(distdir)/src
+	cp LICENSE $(distdir)/
 
 FORCE:
 	-rm $(distdir).tar.gz >/dev/null 2>&1