1 files changed, 3 insertions, 1 deletions
diff --git a/opentrack/tracker.h b/opentrack/tracker.h
index 4282bc4e..f671ecd2 100644
--- a/opentrack/tracker.h
+++ b/opentrack/tracker.h
@@ -3,6 +3,8 @@
 #include <atomic>
 #include <vector>
 
+#include <opencv2/core/core.hpp>
+
 #include "./timer.hpp"
 #include "./plugin-support.h"
 #include "./mappings.hpp"
@@ -31,7 +33,7 @@ private:
     std::atomic<bool> should_quit;
     SelectedLibraries const& libs;
 
-    Quat r_b;
+    cv::Matx33d r_b;
     double t_b[3];
 
     double map(double pos, Mapping& axis);