diff --git a/spatial.py b/spatial.py
index 80249b0..6e35221 100644
--- a/spatial.py
+++ b/spatial.py
@@ -124,6 +124,7 @@ class SpatialTracker:
                 itd_angle, self._last_itd_samples = itd_result
                 self._smooth_itd_angle += SMOOTHING_ALPHA * (
                     self._shortest_angle_diff(itd_angle, self._smooth_itd_angle))
+                self._smooth_itd_angle %= 360  # keep in 0-360
 
         if pos and any_vad:
             # Smooth the position