diff --git a/amstrax/plugins/events/event_positions.py b/amstrax/plugins/events/event_positions.py
index 415b7352..111436e9 100644
--- a/amstrax/plugins/events/event_positions.py
+++ b/amstrax/plugins/events/event_positions.py
@@ -21,7 +21,7 @@
                  default=39500,
                  help='Drift time belonging to the cathode in ns'),
     strax.Option('gate_cathode_distance',
-                 default=505,
+                 default=50.5,
                  help='Distance between gate and cathode in mm'),    
 )