diff --git a/include/omath/3d_primitives/mesh.hpp b/include/omath/3d_primitives/mesh.hpp
index 4ae5718..00a8e50 100644
--- a/include/omath/3d_primitives/mesh.hpp
+++ b/include/omath/3d_primitives/mesh.hpp
@@ -6,6 +6,7 @@
 #include <omath/linear_algebra/mat.hpp>
 #include <omath/linear_algebra/vector3.hpp>
 #include <utility>
+#include <variant>
 #include <vector>
 
 namespace omath::primitives