diff --git a/core/rtw_br_ext.c b/core/rtw_br_ext.c
index dd11235..8a67073 100644
--- a/core/rtw_br_ext.c
+++ b/core/rtw_br_ext.c
@@ -17,7 +17,6 @@
 #ifdef __KERNEL__
 	#include <linux/version.h>
 	#include <linux/if_arp.h>
-	#include <net/ip.h>
 #if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 15, 0))
 	#include <net/ipx.h>
 #endif
diff --git a/include/drv_types.h b/include/drv_types.h
index 3d39416..6263861 100644
--- a/include/drv_types.h
+++ b/include/drv_types.h
@@ -129,7 +129,6 @@ typedef struct _ADAPTER _adapter, ADAPTER, *PADAPTER;
 	#include <rtw_iol.h>
 #endif /* CONFIG_IOL */
 
-#include <ip.h>
 #include <if_ether.h>
 #include <ethernet.h>
 #include <circ_buf.h>
diff --git a/include/ip.h b/include/ip.h
deleted file mode 100644
index 4feb98f..0000000
--- a/include/ip.h
+++ /dev/null
@@ -1,135 +0,0 @@
-/******************************************************************************
- *
- * Copyright(c) 2007 - 2017 Realtek Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- *****************************************************************************/
-#ifndef _LINUX_IP_H
-#define _LINUX_IP_H
-
-/* SOL_IP socket options */
-
-#define IPTOS_TOS_MASK		0x1E
-#define IPTOS_TOS(tos)		((tos)&IPTOS_TOS_MASK)
-#define	IPTOS_LOWDELAY		0x10
-#define	IPTOS_THROUGHPUT	0x08
-#define	IPTOS_RELIABILITY	0x04
-#define	IPTOS_MINCOST		0x02
-
-#define IPTOS_PREC_MASK		0xE0
-#define IPTOS_PREC(tos)		((tos)&IPTOS_PREC_MASK)
-#define IPTOS_PREC_NETCONTROL           0xe0
-#define IPTOS_PREC_INTERNETCONTROL      0xc0
-#define IPTOS_PREC_CRITIC_ECP           0xa0
-#define IPTOS_PREC_FLASHOVERRIDE        0x80
-#define IPTOS_PREC_FLASH                0x60
-#define IPTOS_PREC_IMMEDIATE            0x40
-#define IPTOS_PREC_PRIORITY             0x20
-#define IPTOS_PREC_ROUTINE              0x00
-
-
-/* IP options */
-#define IPOPT_COPY		0x80
-#define IPOPT_CLASS_MASK	0x60
-#define IPOPT_NUMBER_MASK	0x1f
-
-#define	IPOPT_COPIED(o)		((o)&IPOPT_COPY)
-#define	IPOPT_CLASS(o)		((o)&IPOPT_CLASS_MASK)
-#define	IPOPT_NUMBER(o)		((o)&IPOPT_NUMBER_MASK)
-
-#define	IPOPT_CONTROL		0x00
-#define	IPOPT_RESERVED1		0x20
-#define	IPOPT_MEASUREMENT	0x40
-#define	IPOPT_RESERVED2		0x60
-
-#define IPOPT_END	(0 | IPOPT_CONTROL)
-#define IPOPT_NOOP	(1 | IPOPT_CONTROL)
-#define IPOPT_SEC	(2 | IPOPT_CONTROL | IPOPT_COPY)
-#define IPOPT_LSRR	(3 | IPOPT_CONTROL | IPOPT_COPY)
-#define IPOPT_TIMESTAMP	(4 | IPOPT_MEASUREMENT)
-#define IPOPT_RR	(7 | IPOPT_CONTROL)
-#define IPOPT_SID	(8 | IPOPT_CONTROL | IPOPT_COPY)
-#define IPOPT_SSRR	(9 | IPOPT_CONTROL | IPOPT_COPY)
-#define IPOPT_RA	(20 | IPOPT_CONTROL | IPOPT_COPY)
-
-#define IPVERSION	4
-#define MAXTTL		255
-#define IPDEFTTL	64
-
-/* struct timestamp, struct route and MAX_ROUTES are removed.
-
-   REASONS: it is clear that nobody used them because:
-   - MAX_ROUTES value was wrong.
-   - "struct route" was wrong.
-   - "struct timestamp" had fatally misaligned bitfields and was completely unusable.
- */
-
-#define IPOPT_OPTVAL 0
-#define IPOPT_OLEN   1
-#define IPOPT_OFFSET 2
-#define IPOPT_MINOFF 4
-#define MAX_IPOPTLEN 40
-#define IPOPT_NOP IPOPT_NOOP
-#define IPOPT_EOL IPOPT_END
-#define IPOPT_TS  IPOPT_TIMESTAMP
-
-#define	IPOPT_TS_TSONLY		0		/* timestamps only */
-#define	IPOPT_TS_TSANDADDR	1		/* timestamps and addresses */
-#define	IPOPT_TS_PRESPEC	3		/* specified modules only */
-
-#ifdef PLATFORM_LINUX
-
-struct ip_options {
-	__u32		faddr;				/* Saved first hop address */
-	unsigned char	optlen;
-	unsigned char srr;
-	unsigned char rr;
-	unsigned char ts;
-	unsigned char is_setbyuser:1,			/* Set by setsockopt?			*/
-		 is_data:1,			/* Options in __data, rather than skb	*/
-		 is_strictroute:1,		/* Strict source route			*/
-		 srr_is_hit:1,			/* Packet destination addr was our one	*/
-		 is_changed:1,			/* IP checksum more not valid		*/
-		 rr_needaddr:1,			/* Need to record addr of outgoing dev	*/
-		 ts_needtime:1,			/* Need to record timestamp		*/
-		 ts_needaddr:1;			/* Need to record addr of outgoing dev */
-	unsigned char router_alert;
-	unsigned char __pad1;
-	unsigned char __pad2;
-	unsigned char __data[0];
-};
-
-#define optlength(opt) (sizeof(struct ip_options) + opt->optlen)
-#endif
-
-struct iphdr {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
-	__u8	ihl:4,
-		version:4;
-#elif defined (__BIG_ENDIAN_BITFIELD)
-	__u8	version:4,
-		ihl:4;
-#else
-#error	"Please fix <asm/byteorder.h>"
-#endif
-	__u8	tos;
-	__u16	tot_len;
-	__u16	id;
-	__u16	frag_off;
-	__u8	ttl;
-	__u8	protocol;
-	__u16	check;
-	__u32	saddr;
-	__u32	daddr;
-	/*The options start here. */
-};
-
-#endif	/* _LINUX_IP_H */
diff --git a/include/osdep_service_linux.h b/include/osdep_service_linux.h
index 2339af4..6a77e53 100644
--- a/include/osdep_service_linux.h
+++ b/include/osdep_service_linux.h
@@ -50,7 +50,6 @@
 #include <linux/rtnetlink.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>	/* for struct tasklet_struct */
-#include <linux/ip.h>
 #include <linux/kthread.h>
 #include <linux/list.h>
 #include <linux/vmalloc.h>