diff --git a/configure b/configure
index 0a2fb7a4089..6f220b9eb98 100755
--- a/configure
+++ b/configure
@@ -13761,7 +13761,7 @@ $as_echo "#define HAVE_STDBOOL_H 1" >>confdefs.h
 fi
 
 
-for ac_header in atomic.h copyfile.h execinfo.h getopt.h ifaddrs.h langinfo.h mbarrier.h netinet/tcp.h sys/epoll.h sys/event.h sys/personality.h sys/prctl.h sys/procctl.h sys/signalfd.h sys/sockio.h sys/ucred.h termios.h ucred.h
+for ac_header in atomic.h copyfile.h execinfo.h getopt.h ifaddrs.h langinfo.h mbarrier.h netinet/tcp.h sys/epoll.h sys/event.h sys/personality.h sys/prctl.h sys/procctl.h sys/signalfd.h sys/ucred.h termios.h ucred.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
diff --git a/configure.ac b/configure.ac
index e9de78bbd4b..48d3e882b3e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1457,7 +1457,6 @@ AC_CHECK_HEADERS(m4_normalize([
 	sys/prctl.h
 	sys/procctl.h
 	sys/signalfd.h
-	sys/sockio.h
 	sys/ucred.h
 	termios.h
 	ucred.h
diff --git a/src/backend/libpq/ifaddr.c b/src/backend/libpq/ifaddr.c
index a0cad5405e1..73a8707324f 100644
--- a/src/backend/libpq/ifaddr.c
+++ b/src/backend/libpq/ifaddr.c
@@ -325,10 +325,6 @@ pg_foreach_ifaddr(PgIfAddrCallback callback, void *cb_data)
 #include <sys/ioctl.h>
 #include <net/if.h>
 
-#ifdef HAVE_SYS_SOCKIO_H
-#include <sys/sockio.h>
-#endif
-
 #if defined(SIOCGIFCONF)
 
 /*
diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in
index eff09ba0bc5..de8daa2f114 100644
--- a/src/include/pg_config.h.in
+++ b/src/include/pg_config.h.in
@@ -490,9 +490,6 @@
 /* Define to 1 if you have the <sys/signalfd.h> header file. */
 #undef HAVE_SYS_SIGNALFD_H
 
-/* Define to 1 if you have the <sys/sockio.h> header file. */
-#undef HAVE_SYS_SOCKIO_H
-
 /* Define to 1 if you have the <sys/stat.h> header file. */
 #undef HAVE_SYS_STAT_H
 
diff --git a/src/tools/msvc/Solution.pm b/src/tools/msvc/Solution.pm
index 6aeab3aefca..5ad275b2236 100644
--- a/src/tools/msvc/Solution.pm
+++ b/src/tools/msvc/Solution.pm
@@ -359,7 +359,6 @@ sub GenerateFiles
 		HAVE_SYS_PRCTL_H                         => undef,
 		HAVE_SYS_PROCCTL_H                       => undef,
 		HAVE_SYS_SIGNALFD_H                      => undef,
-		HAVE_SYS_SOCKIO_H                        => undef,
 		HAVE_SYS_STAT_H                          => 1,
 		HAVE_SYS_TYPES_H                         => 1,
 		HAVE_SYS_UCRED_H                         => undef,