diff --git a/ChangeLog b/ChangeLog
index 6ebdeedc24..f8f46ae45d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2017-11-15  Joseph Myers  <joseph@codesourcery.com>
 
+	* sysdeps/unix/sysv/linux/bits/socket.h (MSG_ZEROCOPY): New enum
+	constant and macro.
+
 	* sysdeps/unix/sysv/linux/bits/mman-linux.h
 	[__USE_MISC] (MADV_WIPEONFORK): New macro.
 	[__USE_MISC] (MADV_KEEPONFORK): Likewise.
diff --git a/sysdeps/unix/sysv/linux/bits/socket.h b/sysdeps/unix/sysv/linux/bits/socket.h
index a9d16e2bc8..168a8e5ccb 100644
--- a/sysdeps/unix/sysv/linux/bits/socket.h
+++ b/sysdeps/unix/sysv/linux/bits/socket.h
@@ -237,6 +237,8 @@ enum
 #define MSG_WAITFORONE	MSG_WAITFORONE
     MSG_BATCH		= 0x40000, /* sendmmsg: more messages coming.  */
 #define MSG_BATCH	MSG_BATCH
+    MSG_ZEROCOPY	= 0x4000000, /* Use user data in kernel path.  */
+#define MSG_ZEROCOPY	MSG_ZEROCOPY
     MSG_FASTOPEN	= 0x20000000, /* Send data in TCP SYN.  */
 #define MSG_FASTOPEN	MSG_FASTOPEN