diff --git a/openflexure_microscope/api/default_extensions/picamera_autocalibrate/extension.py b/openflexure_microscope/api/default_extensions/picamera_autocalibrate/extension.py
index 5a6f4b21..45a3e213 100644
--- a/openflexure_microscope/api/default_extensions/picamera_autocalibrate/extension.py
+++ b/openflexure_microscope/api/default_extensions/picamera_autocalibrate/extension.py
@@ -1,7 +1,6 @@
 from labthings.server.view import View, ActionView
 from labthings.server.find import find_component
 from labthings.server.extensions import BaseExtension
-from labthings.server.decorators import ThingAction
 
 from flask import abort