1 files changed, 1 insertions, 1 deletions
diff --git a/tracker-pt/ftnoir_tracker_pt.cpp b/tracker-pt/ftnoir_tracker_pt.cpp
index f52564f7..c72a7ffa 100644
--- a/tracker-pt/ftnoir_tracker_pt.cpp
+++ b/tracker-pt/ftnoir_tracker_pt.cpp
@@ -174,7 +174,7 @@ void Tracker_PT::data(double *data)
         alpha = atan2( R(1,0), R(0,0) );
         gamma = atan2( R(2,1), R(2,2) );
 
-        constexpr f rad2deg = f(180/M_PI);
+        constexpr f rad2deg = f(180/pi);
 
         data[Yaw] = rad2deg * alpha;
         data[Pitch] = -rad2deg * beta;