diff --git a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/uplink/LwM2mTypeServer.java b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/uplink/LwM2mTypeServer.java
index 06db345c01..db6a694201 100644
--- a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/uplink/LwM2mTypeServer.java
+++ b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/uplink/LwM2mTypeServer.java
@@ -33,7 +33,7 @@ public enum LwM2mTypeServer {
                 return sm;
             }
         }
-        throw new IllegalArgumentException(String.format("Unsupported typeServer type : %d", type));
+        throw new IllegalArgumentException(String.format("Unsupported typeServer type : %s", type));
     }
 }