diff --git a/README.md b/README.md
index 6efbf9d..831bbe5 100644
--- a/README.md
+++ b/README.md
@@ -814,6 +814,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 * [TinyExpr](https://github.com/codeplea/tinyexpr) - A C library for parsing and evaluating math expressions from strings. [zlib]
 * [Vc](https://github.com/VcDevel/Vc) - SIMD Vector Classes for C++. [BSD]
 * [Versor](http://versor.mat.ucsb.edu/) - A (fast) Generic C++ library for Geometric Algebras, including Euclidean, Projective, Conformal, Spacetime (etc).
+* [Wagyu](https://github.com/mapbox/wagyu) - A general library for geometry operations of union, intersections, difference, and xor. [mapbox-wagyu original]
 * [Wykobi](https://www.wykobi.com) - A C++ library of efficient, robust and simple to use C++ 2D/3D oriented computational geometry routines. [MIT]
 * [xtensor](https://github.com/xtensor-stack/xtensor) - A C++14 library for numerical analysis with multi-dimensional array expressions, inspired by NumPy syntax. [BSD 3-clause] [website](https://xtensor-stack.github.io/xtensor)
 * [universal](https://github.com/stillwater-sc/universal) - A C++14 header-only library implementing arbitrary posit arithmetic. The posit number system is a tapered floating point that is more efficient than IEEE floating point. Posits enable reproducible computational science. [MIT license]