diff --git a/9unit.c b/9unit.c
new file mode 100644
index 0000000..be3cedf
--- /dev/null
+++ b/9unit.c
@@ -0,0 +1,21 @@
+/*
+
+	9unit
+	Copyright (C) 2023  Jonathan Lamothe <jonathan@jlamothe.net>
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or (at
+	your option) any later version.
+
+	This program is distributed in the hope that it will be useful, but
+	WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+	General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+//jl
diff --git a/mkfile b/mkfile
index a811b8e..3f6d985 100644
--- a/mkfile
+++ b/mkfile
@@ -16,4 +16,10 @@
 
 </$objtype/mkfile
 
+LIB=9unit.a
+OFILES=9unit.$O
+HFILES=9unit.h
+
+</sys/src/cmd/mklib
+
 #jl