diff --git a/libs/geom/include/psemek/geom/rotation.hpp b/libs/geom/include/psemek/geom/rotation.hpp
index 04576f10..ea60cb8d 100644
--- a/libs/geom/include/psemek/geom/rotation.hpp
+++ b/libs/geom/include/psemek/geom/rotation.hpp
@@ -34,7 +34,7 @@ namespace psemek::geom
 		void fill_matrix(Matrix & m) const;
 	};
 
-	// 3N-rotation around an axis
+	// 3D-rotation around an axis
 	template <typename T>
 	struct axis_rotation
 	{