diff --git a/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/common/data/proxies/ProxyIdentifiableEntity.java b/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/common/data/proxies/ProxyIdentifiableEntity.java
index dc1fe368b..d2362e419 100644
--- a/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/common/data/proxies/ProxyIdentifiableEntity.java
+++ b/hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/common/data/proxies/ProxyIdentifiableEntity.java
@@ -88,6 +88,6 @@ public abstract class ProxyIdentifiableEntity implements Serializable {
 
     @Override
     public String toString() {
-        return id.toString();
+        return String.valueOf(id);
     }
 }