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-rw-r--r--sysdeps/unix/sysv/linux/bits/socket.h2
1 files changed, 2 insertions, 0 deletions
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