diff --git a/subsys/net/lib/lwm2m/lwm2m_engine.c b/subsys/net/lib/lwm2m/lwm2m_engine.c
index 5dddeb19759..92d5081b3b4 100644
--- a/subsys/net/lib/lwm2m/lwm2m_engine.c
+++ b/subsys/net/lib/lwm2m/lwm2m_engine.c
@@ -948,8 +948,7 @@ int lwm2m_init_message(struct lwm2m_message *msg)
 	}
 
 	r = coap_packet_init(&msg->cpkt, msg->msg_data, sizeof(msg->msg_data),
-			     1, msg->type, tokenlen, token, msg->code,
-			     (msg->mid == LWM2M_MSG_ID_GENERATE_NEW ? coap_next_id() : msg->mid));
+			     1, msg->type, tokenlen, token, msg->code, msg->mid);
 	if (r < 0) {
 		LOG_ERR("coap packet init error (err:%d)", r);
 		goto cleanup;
@@ -3973,7 +3972,7 @@ static int generate_notify_message(struct observe_node *obs,
 
 	msg->type = COAP_TYPE_CON;
 	msg->code = COAP_RESPONSE_CODE_CONTENT;
-	msg->mid = LWM2M_MSG_ID_GENERATE_NEW;
+	msg->mid = coap_next_id();
 	msg->token = obs->token;
 	msg->tkl = obs->tkl;
 	msg->reply_cb = notify_message_reply_cb;
diff --git a/subsys/net/lib/lwm2m/lwm2m_engine.h b/subsys/net/lib/lwm2m/lwm2m_engine.h
index 677e9a77742..94fe10993b4 100644
--- a/subsys/net/lib/lwm2m/lwm2m_engine.h
+++ b/subsys/net/lib/lwm2m/lwm2m_engine.h
@@ -41,9 +41,6 @@
 /* Use this value to skip token generation */
 #define LWM2M_MSG_TOKEN_LEN_SKIP	0xFF
 
-/* Use this value to generate a new message id */
-#define LWM2M_MSG_ID_GENERATE_NEW   0U
-
 /* length of time in milliseconds to wait for buffer allocations */
 #define BUF_ALLOC_TIMEOUT K_SECONDS(1)
 
diff --git a/subsys/net/lib/lwm2m/lwm2m_obj_firmware_pull.c b/subsys/net/lib/lwm2m/lwm2m_obj_firmware_pull.c
index 21aa2902b11..156ca4dee22 100644
--- a/subsys/net/lib/lwm2m/lwm2m_obj_firmware_pull.c
+++ b/subsys/net/lib/lwm2m/lwm2m_obj_firmware_pull.c
@@ -84,7 +84,7 @@ static int transfer_request(struct coap_block_context *ctx,
 
 	msg->type = COAP_TYPE_CON;
 	msg->code = COAP_METHOD_GET;
-	msg->mid = LWM2M_MSG_ID_GENERATE_NEW;
+	msg->mid = coap_next_id();
 	msg->token = token;
 	msg->tkl = tkl;
 	msg->reply_cb = reply_cb;
diff --git a/subsys/net/lib/lwm2m/lwm2m_rd_client.c b/subsys/net/lib/lwm2m/lwm2m_rd_client.c
index 6b4f46ba5ba..e20646e8197 100644
--- a/subsys/net/lib/lwm2m/lwm2m_rd_client.c
+++ b/subsys/net/lib/lwm2m/lwm2m_rd_client.c
@@ -549,7 +549,7 @@ static int sm_do_bootstrap_reg(void)
 
 	msg->type = COAP_TYPE_CON;
 	msg->code = COAP_METHOD_POST;
-	msg->mid = LWM2M_MSG_ID_GENERATE_NEW;
+	msg->mid = coap_next_id();
 	msg->reply_cb = do_bootstrap_reply_cb;
 	msg->message_timeout_cb = do_bootstrap_reg_timeout_cb;
 
@@ -629,7 +629,7 @@ static int sm_send_registration(bool send_obj_support_data,
 
 	msg->type = COAP_TYPE_CON;
 	msg->code = COAP_METHOD_POST;
-	msg->mid = LWM2M_MSG_ID_GENERATE_NEW;
+	msg->mid = coap_next_id();
 	msg->reply_cb = reply_cb;
 	msg->message_timeout_cb = timeout_cb;
 
@@ -821,7 +821,7 @@ static int sm_do_deregister(void)
 
 	msg->type = COAP_TYPE_CON;
 	msg->code = COAP_METHOD_DELETE;
-	msg->mid = LWM2M_MSG_ID_GENERATE_NEW;
+	msg->mid = coap_next_id();
 	msg->reply_cb = do_deregister_reply_cb;
 	msg->message_timeout_cb = do_deregister_timeout_cb;