1 files changed, 4 insertions, 0 deletions
diff --git a/src/body.h b/src/body.h
index 23ed2ca..4653588 100644
--- a/src/body.h
+++ b/src/body.h
@@ -14,6 +14,9 @@
 using Eigen::Matrix;
 using Eigen::Vector3d;
 using Eigen::Quaterniond;
+using std::cout;
+using std::cerr;
+using std::endl;
 
 /*
  * =====================================================================================
@@ -32,6 +35,7 @@ class Body
         Matrix<double,STATESIZE,STATESIZE> F(const Vector3d &ang, double dt);
         Quaterniond qhat();
         void qhat(const Quaterniond &q);
+        void normalizeQuaternion();
 #else
         Matrix<double,STATESIZE,STATESIZE> F(const Vector3d &ang, const Quaterniond &q, double dt);
 #endif