diff --git a/commands.d/signal-notify.conf b/commands.d/signal-notify.conf
index f1e686d..bdabd6a 100644
--- a/commands.d/signal-notify.conf
+++ b/commands.d/signal-notify.conf
@@ -77,9 +77,9 @@ object NotificationCommand "signal-service-notification" {
     notification_servicestate = "$service.state$"
     notification_useremail = "$user.email$"
     notification_servicedisplayname = "$service.display_name$"
-    notification_signal_gateway_host = "$icinga.signal_gateway_host"
-    notification_signal_gateway_port = "$icinga.signal_gateway_port"                                
-    notification_signal_gateway_proto = "$icinga.signal_gateway_proto"
+    notification_signal_gateway_host = "$icinga.signal_gateway_host$"
+    notification_signal_gateway_port = "$icinga.signal_gateway_port$"
+    notification_signal_gateway_proto = "$icinga.signal_gateway_proto$"
   }
 }