diff --git a/src/openflexure_microscope_server/things/autofocus.py b/src/openflexure_microscope_server/things/autofocus.py
index d2d798a3..cfd67cbf 100644
--- a/src/openflexure_microscope_server/things/autofocus.py
+++ b/src/openflexure_microscope_server/things/autofocus.py
@@ -337,7 +337,7 @@ class AutofocusThing(Thing):
                 success = True
                 break
 
-            # If "result" remains as "restart", move to the start and autofocus
+            # If a stack is not successful, move to the start and autofocus
             self.reset_stack(
                 heights,
                 autofocus_dz,