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-rw-r--r--sysdeps/gnu/netinet/tcp.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/sysdeps/gnu/netinet/tcp.h b/sysdeps/gnu/netinet/tcp.h
index 1a164a9649..41ca11b5f5 100644
--- a/sysdeps/gnu/netinet/tcp.h
+++ b/sysdeps/gnu/netinet/tcp.h
@@ -79,6 +79,7 @@
 #define TCP_INQ			 36 /* Notify bytes available to read
 				       as a cmsg on read.  */
 #define TCP_CM_INQ		 TCP_INQ
+#define TCP_TX_DELAY		 37 /* Delay outgoing packets by XX usec.  */
 
 #define TCP_REPAIR_ON		 1
 #define TCP_REPAIR_OFF		 0