diff --git a/cylc/flow/simulation.py b/cylc/flow/simulation.py
index edf52d322d3..3b737eec642 100644
--- a/cylc/flow/simulation.py
+++ b/cylc/flow/simulation.py
@@ -101,7 +101,7 @@ def __init__(
             # Get the try number:
             try_num = db_info["try_num"]
 
-        # Update anything changed by broadcast:
+        # Parse fail cycle points:
         if rtconfig != itask.tdef.rtconfig:
             try:
                 rtconfig["simulation"][