diff --git a/common/coap-server/src/main/java/org/thingsboard/server/coapserver/TbCoapDtlsSettings.java b/common/coap-server/src/main/java/org/thingsboard/server/coapserver/TbCoapDtlsSettings.java
index f27131b7ab..9c6e606af5 100644
--- a/common/coap-server/src/main/java/org/thingsboard/server/coapserver/TbCoapDtlsSettings.java
+++ b/common/coap-server/src/main/java/org/thingsboard/server/coapserver/TbCoapDtlsSettings.java
@@ -61,7 +61,7 @@ public class TbCoapDtlsSettings {
     @Value("${transport.coap.dtls.retransmission_timeout:9000}")
     private int dtlsRetransmissionTimeout;
 
-    @Value("${transport.coap.dtls.connection_id_length}")
+    @Value("${transport.coap.dtls.connection_id_length:}")
     private Integer cIdLength;
 
     @Bean