diff --git a/examples/hawkbit-device-simulator/src/main/java/org/eclipse/hawkbit/simulator/DeviceSimulatorUpdater.java b/examples/hawkbit-device-simulator/src/main/java/org/eclipse/hawkbit/simulator/DeviceSimulatorUpdater.java
index b7423e899..9c4c43ad2 100644
--- a/examples/hawkbit-device-simulator/src/main/java/org/eclipse/hawkbit/simulator/DeviceSimulatorUpdater.java
+++ b/examples/hawkbit-device-simulator/src/main/java/org/eclipse/hawkbit/simulator/DeviceSimulatorUpdater.java
@@ -197,7 +197,7 @@ public class DeviceSimulatorUpdater {
             return result;
         }
 
-        private boolean isErrorResponse(final UpdateStatus status) {
+        private static boolean isErrorResponse(final UpdateStatus status) {
             if (status == null) {
                 return false;
             }