diff --git a/Tools/autotest/arduplane.py b/Tools/autotest/arduplane.py
index c09fb594c8..1b0448957d 100644
--- a/Tools/autotest/arduplane.py
+++ b/Tools/autotest/arduplane.py
@@ -3013,7 +3013,7 @@ class AutoTestPlane(vehicle_test_suite.TestSuite):
             if m.relative_alt/1000.0 > max_alt:
                 max_alt = m.relative_alt/1000.0
 
-        self.install_message_hook(record_maxalt)
+        self.install_message_hook_context(record_maxalt)
 
         self.fly_mission_waypoints(num_wp-1, mission_timeout=600)