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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 87099ec14a..2c04ec9b7f 100644
--- a/sysdeps/gnu/netinet/tcp.h
+++ b/sysdeps/gnu/netinet/tcp.h
@@ -49,6 +49,7 @@
 #define TCP_WINDOW_CLAMP 10	/* Bound advertised window */
 #define TCP_INFO	 11	/* Information about this connection. */
 #define	TCP_QUICKACK	 12	/* Bock/reenable quick ACKs.  */
+#define TCP_CONGESTION	 13	/* Congestion control algorithm.  */
 
 #ifdef __USE_MISC
 # include <sys/types.h>