diff --git a/src/orisys/sensor.py b/src/orisys/sensor.py
index 28751cd..452756e 100644
--- a/src/orisys/sensor.py
+++ b/src/orisys/sensor.py
@@ -1095,7 +1095,14 @@ class Sensor:
         #     self.cap = None
         #     if self.verbose:
         #         print("Sensor disconnected.")
-        cv2.destroyAllWindows()
+        try:
+            cv2.destroyAllWindows()
+        except cv2.error:
+            # A headless OpenCV build (``opencv-python-headless``) has no highgui,
+            # so there is nothing to close. Failing here would leave the rest of
+            # the shutdown — and every caller that disconnects in a ``finally`` —
+            # reporting an error that says nothing about the sensor.
+            pass
 
     # =========================================================================
     # Public API - Configuration & Calibration