diff --git a/eclair-core/src/main/resources/reference.conf b/eclair-core/src/main/resources/reference.conf
index be86545ef..14d3bc68c 100644
--- a/eclair-core/src/main/resources/reference.conf
+++ b/eclair-core/src/main/resources/reference.conf
@@ -209,8 +209,9 @@ eclair {
 // do not edit or move this section
 eclair {
   backup-mailbox {
-    mailbox-type = "akka.dispatch.NonBlockingBoundedMailbox"
+    mailbox-type = "akka.dispatch.BoundedMailbox"
     mailbox-capacity = 1
+    mailbox-push-timeout-time = 0
   }
   backup-dispatcher {
     executor = "thread-pool-executor"