diff --git a/control/gen-fan-zone-defs.py b/control/gen-fan-zone-defs.py
index 40bec2c..b89e5bc 100755
--- a/control/gen-fan-zone-defs.py
+++ b/control/gen-fan-zone-defs.py
@@ -393,8 +393,11 @@
         return
     event['groups'] = grps
 
-    # Add set speed actions and function parameters
-    event['action'] = getActions(e, e, events_data)
+    # Add optional set speed actions and function parameters
+    event['action'] = []
+    if ('actions' in e) and \
+       (e['actions'] is not None):
+        event['action'] = getActions(e, e, events_data)
 
     # Add signal handlers
     signals = []