diff --git a/agb/src/agbabi/LICENSE.md b/agb/src/agbabi/LICENSE.md
new file mode 100644
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+++ b/agb/src/agbabi/LICENSE.md
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+libagbabi is available under the [zlib license](https://www.zlib.net/zlib_license.html) :
+
+This software is provided 'as-is', without any express or implied
+warranty.  In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not
+   claim that you wrote the original software. If you use this software
+   in a product, an acknowledgment in the product documentation would be
+   appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.