diff --git a/media/libheadtracking/PoseRateLimiter.h b/media/libheadtracking/PoseRateLimiter.h
index aa2fe80..c673a33 100644
--- a/media/libheadtracking/PoseRateLimiter.h
+++ b/media/libheadtracking/PoseRateLimiter.h
@@ -77,6 +77,8 @@
 
     Pose3f calculatePose(int64_t timestamp);
 
+    std::string toString(unsigned level) const;
+
   private:
     struct Point {
         Pose3f pose;