diff --git a/simulator-http/src/main/java/de/dentrassi/hono/simulator/http/Device.java b/simulator-http/src/main/java/de/dentrassi/hono/simulator/http/Device.java
index ffede2b..7ee64e9 100644
--- a/simulator-http/src/main/java/de/dentrassi/hono/simulator/http/Device.java
+++ b/simulator-http/src/main/java/de/dentrassi/hono/simulator/http/Device.java
@@ -106,7 +106,7 @@ protected void tick() {
                 .sendBuffer(this.payload.getBuffer(), ar -> {
 
                     response(start, ar)
-                            .setHandler(v -> scheduleNext(start.plus(config.getPeriod())));
+                            .setHandler(v -> scheduleNext(start.plus(this.config.getPeriod())));
 
                 });