diff --git a/src/openflexure_microscope_server/things/stage/__init__.py b/src/openflexure_microscope_server/things/stage/__init__.py
index 4bbcacaf..3643fc5d 100644
--- a/src/openflexure_microscope_server/things/stage/__init__.py
+++ b/src/openflexure_microscope_server/things/stage/__init__.py
@@ -194,7 +194,7 @@ class BaseStage(lt.Thing):
         )
 
     @lt.thing_action
-    def set_zero_position(self) -> Never:
+    def set_zero_position(self) -> None:
         """Make the current position zero in all axes.
 
         This action does not move the stage, but resets the position to zero.