diff --git a/modules/electrophysiology_browser/php/models/electrophysioevents.class.inc b/modules/electrophysiology_browser/php/models/electrophysioevents.class.inc
index b134cf8d3aa..845ee27b9b5 100644
--- a/modules/electrophysiology_browser/php/models/electrophysioevents.class.inc
+++ b/modules/electrophysiology_browser/php/models/electrophysioevents.class.inc
@@ -63,7 +63,7 @@ class ElectrophysioEvents
 
         $this->_data = [
             'instances'     => $taskEvents,
-            'extra_columns' => $extraColumns,
+            'extraColumns'  => $extraColumns,
         ];
     }