diff --git a/app/models/ticket/escalation.rb b/app/models/ticket/escalation.rb
index 2a8fdbbbc..86007685c 100644
--- a/app/models/ticket/escalation.rb
+++ b/app/models/ticket/escalation.rb
@@ -25,7 +25,7 @@ module Ticket::Escalation
     end
 
     # get sla for ticket
-    sla_selected = self._escalation_calculation_get_sla
+    sla_selected = _escalation_calculation_get_sla
 
     # reset escalation if no sla is set
     if !sla_selected