diff --git a/workbooks/service_initialize.yaml b/workbooks/service_initialize.yaml
index 8343006a141bd5a7d13ad4c525b26e8311c79dea..30bd321017a73ddd471a8ebdc0743a0a6cc2e193 100644
--- a/workbooks/service_initialize.yaml
+++ b/workbooks/service_initialize.yaml
@@ -349,6 +349,7 @@ workflows:
           host: localhost
           username: s3temp
           private_key: <% $.ssh_hack_key %>
+          private_key_filename: ""
         on-success:
           - update_s3_user
           - remove_temporary_role