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-rw-r--r--include/netinet/tcp.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/netinet/tcp.h b/include/netinet/tcp.h
index 6c2d2891..94e54cf3 100644
--- a/include/netinet/tcp.h
+++ b/include/netinet/tcp.h
@@ -18,6 +18,8 @@
 #define TCP_CONGESTION	 13
 #define TCP_MD5SIG	 14
 
+#define SOL_TCP 6
+
 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
 #include <sys/types.h>
 #include <sys/socket.h>