diff --git a/inet/protocols/talkd.h b/inet/protocols/talkd.h
index 0437ae4..34e2654 100644
--- a/inet/protocols/talkd.h
+++ b/inet/protocols/talkd.h
@@ -52,6 +52,7 @@
 
 #include <sys/types.h>
 #include <sys/socket.h>
+#include <stdint.h>
 
 /*
  * Client->server request message format.
diff --git a/resolv/arpa/nameser.h b/resolv/arpa/nameser.h
index 47240c7..62c11e0 100644
--- a/resolv/arpa/nameser.h
+++ b/resolv/arpa/nameser.h
@@ -58,7 +58,7 @@
 
 #include <sys/param.h>
 #include <sys/types.h>
-#include <sys/cdefs.h>
+#include <stdint.h>
 
 /*%
  * Revision information.  This is the release date in YYYYMMDD format.
diff --git a/sysdeps/generic/netinet/in_systm.h b/sysdeps/generic/netinet/in_systm.h
index 1629c36..7b9a92b 100644
--- a/sysdeps/generic/netinet/in_systm.h
+++ b/sysdeps/generic/netinet/in_systm.h
@@ -19,8 +19,8 @@
 #ifndef _NETINET_IN_SYSTM_H
 #define _NETINET_IN_SYSTM_H 1
 
-#include <sys/cdefs.h>
 #include <sys/types.h>
+#include <stdint.h>
 
 __BEGIN_DECLS
 
diff --git a/sysdeps/gnu/netinet/ip_icmp.h b/sysdeps/gnu/netinet/ip_icmp.h
index e57b144..542e789 100644
--- a/sysdeps/gnu/netinet/ip_icmp.h
+++ b/sysdeps/gnu/netinet/ip_icmp.h
@@ -18,8 +18,8 @@
 #ifndef __NETINET_IP_ICMP_H
 #define __NETINET_IP_ICMP_H    1
 
-#include <sys/cdefs.h>
 #include <sys/types.h>
+#include <stdint.h>
 
 __BEGIN_DECLS
 
diff --git a/sysdeps/gnu/netinet/tcp.h b/sysdeps/gnu/netinet/tcp.h
index 42ec108..3fbea54 100644
--- a/sysdeps/gnu/netinet/tcp.h
+++ b/sysdeps/gnu/netinet/tcp.h
@@ -73,6 +73,7 @@
 #ifdef __USE_MISC
 # include <sys/types.h>
 # include <sys/socket.h>
+# include <stdint.h>
 
 typedef	uint32_t tcp_seq;
 /*
diff --git a/sysdeps/gnu/netinet/udp.h b/sysdeps/gnu/netinet/udp.h
index f55391c..d5f60e4 100644
--- a/sysdeps/gnu/netinet/udp.h
+++ b/sysdeps/gnu/netinet/udp.h
@@ -47,9 +47,8 @@
 #ifndef __NETINET_UDP_H
 #define __NETINET_UDP_H    1
 
-#include <features.h>
 #include <sys/types.h>
-
+#include <stdint.h>
 
 /* UDP header as specified by RFC 768, August 1980. */
 
diff --git a/sysdeps/unix/sysv/linux/net/ethernet.h b/sysdeps/unix/sysv/linux/net/ethernet.h
index 56b3276..833473e 100644
--- a/sysdeps/unix/sysv/linux/net/ethernet.h
+++ b/sysdeps/unix/sysv/linux/net/ethernet.h
@@ -21,8 +21,9 @@
 #ifndef __NET_ETHERNET_H
 #define __NET_ETHERNET_H 1
 
-#include <sys/cdefs.h>
 #include <sys/types.h>
+#include <stdint.h>
+
 #include <linux/if_ether.h>     /* IEEE 802.3 Ethernet constants */
 
 __BEGIN_DECLS
diff --git a/sysdeps/unix/sysv/linux/net/if_arp.h b/sysdeps/unix/sysv/linux/net/if_arp.h
index 93758c8..9a20c83 100644
--- a/sysdeps/unix/sysv/linux/net/if_arp.h
+++ b/sysdeps/unix/sysv/linux/net/if_arp.h
@@ -20,12 +20,11 @@
 /* Based on the 4.4BSD and Linux version of this file.  */
 
 #ifndef _NET_IF_ARP_H
-
 #define _NET_IF_ARP_H 1
-#include <sys/cdefs.h>
 
 #include <sys/types.h>
 #include <sys/socket.h>
+#include <stdint.h>
 
 __BEGIN_DECLS
 
diff --git a/sysdeps/unix/sysv/linux/net/if_ppp.h b/sysdeps/unix/sysv/linux/net/if_ppp.h
index 20310eb..9994982 100644
--- a/sysdeps/unix/sysv/linux/net/if_ppp.h
+++ b/sysdeps/unix/sysv/linux/net/if_ppp.h
@@ -49,8 +49,7 @@
 #define __NET_IF_PPP_H 1
 
 #include <sys/types.h>
-#include <sys/cdefs.h>
-
+#include <stdint.h>
 #include <net/if.h>
 #include <sys/ioctl.h>
 #include <net/ppp_defs.h>
diff --git a/sysdeps/unix/sysv/linux/net/if_shaper.h b/sysdeps/unix/sysv/linux/net/if_shaper.h
index 4a777d8..e318794 100644
--- a/sysdeps/unix/sysv/linux/net/if_shaper.h
+++ b/sysdeps/unix/sysv/linux/net/if_shaper.h
@@ -18,8 +18,8 @@
 #ifndef _NET_IF_SHAPER_H
 #define _NET_IF_SHAPER_H 1
 
-#include <features.h>
 #include <sys/types.h>
+#include <stdint.h>
 #include <net/if.h>
 #include <sys/ioctl.h>
 
diff --git a/sysdeps/unix/sysv/linux/netinet/if_fddi.h b/sysdeps/unix/sysv/linux/netinet/if_fddi.h
index 877f738..6758014 100644
--- a/sysdeps/unix/sysv/linux/netinet/if_fddi.h
+++ b/sysdeps/unix/sysv/linux/netinet/if_fddi.h
@@ -18,10 +18,8 @@
 #ifndef _NETINET_IF_FDDI_H
 #define	_NETINET_IF_FDDI_H 1
 
-#include <sys/cdefs.h>
 #include <sys/types.h>
-#include <asm/types.h>
-
+#include <stdint.h>
 #include <linux/if_fddi.h>
 
 #ifdef __USE_MISC
diff --git a/sysdeps/unix/sysv/linux/netinet/if_tr.h b/sysdeps/unix/sysv/linux/netinet/if_tr.h
index 5df2206..814a35d 100644
--- a/sysdeps/unix/sysv/linux/netinet/if_tr.h
+++ b/sysdeps/unix/sysv/linux/netinet/if_tr.h
@@ -18,8 +18,8 @@
 #ifndef _NETINET_IF_TR_H
 #define	_NETINET_IF_TR_H 1
 
-#include <sys/cdefs.h>
 #include <sys/types.h>
+#include <stdint.h>
 
 /* IEEE 802.5 Token-Ring magic constants.  The frame sizes omit the preamble
    and FCS/CRC (frame check sequence). */
diff --git a/sysdeps/unix/sysv/linux/netipx/ipx.h b/sysdeps/unix/sysv/linux/netipx/ipx.h
index 1d6cb78..338aab5 100644
--- a/sysdeps/unix/sysv/linux/netipx/ipx.h
+++ b/sysdeps/unix/sysv/linux/netipx/ipx.h
@@ -18,9 +18,8 @@
 #ifndef __NETIPX_IPX_H
 #define __NETIPX_IPX_H 1
 
-#include <features.h>
-
 #include <sys/types.h>
+#include <stdint.h>
 #include <bits/sockaddr.h>
 
 __BEGIN_DECLS
diff --git a/sysdeps/unix/sysv/linux/sys/acct.h b/sysdeps/unix/sysv/linux/sys/acct.h
index c629ad4..d24c2a7 100644
--- a/sysdeps/unix/sysv/linux/sys/acct.h
+++ b/sysdeps/unix/sysv/linux/sys/acct.h
@@ -18,12 +18,11 @@
 #ifndef _SYS_ACCT_H
 #define _SYS_ACCT_H	1
 
-#include <features.h>
-
+#include <sys/types.h>
+#include <stdint.h>
 #include <endian.h>
 #define	__need_time_t
 #include <time.h>
-#include <sys/types.h>
 
 __BEGIN_DECLS
 
diff --git a/sysdeps/unix/sysv/linux/sys/quota.h b/sysdeps/unix/sysv/linux/sys/quota.h
index d675664..3e6b4ba 100644
--- a/sysdeps/unix/sysv/linux/sys/quota.h
+++ b/sysdeps/unix/sysv/linux/sys/quota.h
@@ -35,8 +35,8 @@
 #ifndef _SYS_QUOTA_H
 #define _SYS_QUOTA_H 1
 
-#include <features.h>
 #include <sys/types.h>
+#include <stdint.h>
 
 /*
  * Select between different incompatible quota versions.
