diff --git a/global/overlay/etc/puppet/manifests/cosmos-site.pp b/global/overlay/etc/puppet/manifests/cosmos-site.pp
index 613941ef..e63c5743 100644
--- a/global/overlay/etc/puppet/manifests/cosmos-site.pp
+++ b/global/overlay/etc/puppet/manifests/cosmos-site.pp
@@ -393,6 +393,7 @@ class eidas_de_middleware($version="106-rs",$hostname='localhost') {
                    "POSEIDAS_ADMIN_HASHED_PASSWORD=$poseidas_admin_hashed_password",
                    "SPRING_DATASOURCE_PASSWORD=$spring_datasource_password",
                    "MIDDLEWARE_CRYPT_PIN=$middleware_crypt_pin",
+                   "JAVA_OPTS=-DformatMsgNoLookups=true",
                    "MIDDLEWARE_SIGN_PIN=$middleware_sign_pin"],
       extra_parameters => ["--log-driver=syslog"]
    }