diff --git a/DDG4/python/DDSim/Helper/Action.py b/DDG4/python/DDSim/Helper/Action.py
index ec6fc8cc682034589ecc0c9619c789422a04db76..f87574ebfe644a0187470f802468c6238e078068 100644
--- a/DDG4/python/DDSim/Helper/Action.py
+++ b/DDG4/python/DDSim/Helper/Action.py
@@ -37,7 +37,7 @@ class Action(ConfigHelper):
   >>> SIM.action.run = "Geant4TestRunAction"
   # multiple actions with comma-separated names:
   >>> SIM.action.event = "Geant4TestEventAction/Action0,Geant4TestEventAction/Action1"
-  # single actuon by tuple of name and parameter dict:
+  # single action by tuple of name and parameter dict:
   >>> SIM.action.track = ( "Geant4TestTrackAction", {"Property_int": 10} )
   # single action by dict of name and parameter dict:
   >>> SIM.action.step = { "name": "Geant4TestStepAction", "parameter": {"Property_int": 10} }