1 files changed, 2 insertions, 2 deletions
diff --git a/tracker-rift-080/ftnoir_tracker_rift_080.cpp b/tracker-rift-080/ftnoir_tracker_rift_080.cpp
index f8091613..8522a540 100644
--- a/tracker-rift-080/ftnoir_tracker_rift_080.cpp
+++ b/tracker-rift-080/ftnoir_tracker_rift_080.cpp
@@ -1,7 +1,6 @@
 /* Copyright: "i couldn't care less what anyone does with the 5 lines of code i wrote" - mm0zct */
 #include "ftnoir_tracker_rift_080.h"
 #include "api/plugin-api.hpp"
-#include "compat/pi-constant.hpp"
 
 #include <QString>
 
@@ -10,6 +9,7 @@
 #include <OVR_CAPI_0_8_0.h>
 
 #include <cstdio>
+#include <cmath>
 
 using namespace OVR;
 
@@ -79,7 +79,7 @@ void Rift_Tracker::data(double *data)
                     yaw_ += s.constant_drift;
                 old_yaw = yaw_;
             }
-            static constexpr double d2r = 180 / OPENTRACK_PI;
+            static constexpr double d2r = 180 / M_PI;
             data[Yaw] = yaw_                   * -d2r;
             data[Pitch] = double(pitch)        *  d2r;
             data[Roll] = double(roll)          *  d2r;