diff --git a/include/sta/math/quaternion.hpp b/include/sta/math/quaternion.hpp
index 0e7e528..2e2e67d 100644
--- a/include/sta/math/quaternion.hpp
+++ b/include/sta/math/quaternion.hpp
@@ -61,6 +61,8 @@ namespace sta
 			Quaternion normalized();
 
 			Quaternion conjugate();			
+
+			matrix toRotationMatrix();
 		public:
 			float x, y, z, w;
 		};