diff --git a/app/controllers/admin/programs_controller.rb b/app/controllers/admin/programs_controller.rb
index d47d4d1d..0a032e29 100644
--- a/app/controllers/admin/programs_controller.rb
+++ b/app/controllers/admin/programs_controller.rb
@@ -12,7 +12,7 @@ module Admin
     def update
       authorize! :update, @conference.program
       @program = @conference.program
-      params['program']['languages'] = params['program']['languages'].join(',') if params['program']['languages'].present?
+      params['program']['languages'] = params['program']['languages'].join(',') if params['program']&.dig('languages')&.present?
       @program.assign_attributes(program_params)
       send_mail_on_schedule_public = @program.notify_on_schedule_public?
       event_schedules_count_was = @program.event_schedules.count