diff --git a/include/nuttx/net/net.h b/include/nuttx/net/net.h
index e86ebadb3306c..0d1f230de8d04 100644
--- a/include/nuttx/net/net.h
+++ b/include/nuttx/net/net.h
@@ -466,18 +466,6 @@ int net_lockedwait_uninterruptible(sem_t *sem);
 FAR struct iob_s *net_ioballoc(bool throttled, enum iob_user_e consumerid);
 #endif
 
-/****************************************************************************
- * Name: net_setipid
- *
- * Description:
- *   This function may be used at boot time to set the initial ip_id.
- *
- * Assumptions:
- *
- ****************************************************************************/
-
-void net_setipid(uint16_t id);
-
 /****************************************************************************
  * Name: net_checksd
  *
diff --git a/net/inet/Make.defs b/net/inet/Make.defs
index 07895886f82a1..980db1bf49a4c 100644
--- a/net/inet/Make.defs
+++ b/net/inet/Make.defs
@@ -47,7 +47,6 @@ endif
 
 ifeq ($(CONFIG_NET_IPv4),y)
 SOCK_CSRCS += ipv4_setsockopt.c ipv4_getsockname.c ipv4_getpeername.c
-SOCK_CSRCS += inet_setipid.c
 endif
 
 ifeq ($(CONFIG_NET_IPv6),y)
diff --git a/net/inet/inet.h b/net/inet/inet.h
index 154f149c2c1a0..54adbde77476a 100644
--- a/net/inet/inet.h
+++ b/net/inet/inet.h
@@ -129,18 +129,6 @@ struct tcp_conn_s; /* Forward reference */
 #endif
 struct socket; /* Forward reference */
 
-/****************************************************************************
- * Name: inet_setipid
- *
- * Description:
- *   This function may be used at boot time to set the initial ip_id.
- *
- * Assumptions:
- *
- ****************************************************************************/
-
-void inet_setipid(uint16_t id);
-
 /****************************************************************************
  * Name: inet_sockif
  *
@@ -159,7 +147,7 @@ void inet_setipid(uint16_t id);
  ****************************************************************************/
 
 FAR const struct sock_intf_s *
-  inet_sockif(sa_family_t family, int type, int protocol);
+inet_sockif(sa_family_t family, int type, int protocol);
 
 /****************************************************************************
  * Name: ipv4_setsockopt and ipv6_setsockopt
diff --git a/net/inet/inet_setipid.c b/net/inet/inet_setipid.c
deleted file mode 100644
index 16ce2c111f7dc..0000000000000
--- a/net/inet/inet_setipid.c
+++ /dev/null
@@ -1,67 +0,0 @@
-/****************************************************************************
- * net/inet/net_setipid.c
- *
- *   Copyright (C) 2007, 2009, 2017 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- *    used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
-
-/****************************************************************************
- * Included Files
- ****************************************************************************/
-
-#include <nuttx/config.h>
-#ifdef CONFIG_NET
-
-#include <stdint.h>
-#include <debug.h>
-
-#include "inet/inet.h"
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: inet_setipid
- *
- * Description:
- *   This function may be used at boot time to set the initial ip_id.
- *
- * Assumptions:
- *
- ****************************************************************************/
-
-void inet_setipid(uint16_t id)
-{
-  g_ipid = id;
-}
-
-#endif /* CONFIG_NET */