default features: make musl usable without feature test macros

[musl] / include / netinet / tcp.h

diff --git a/include/netinet/tcp.h b/include/netinet/tcp.h
index 797ce68..5049dd9 100644 (file)
--- a/include/netinet/tcp.h
+++ b/include/netinet/tcp.h
@@ -1,6 +1,8 @@
 #ifndef _NETINET_TCP_H
 #define _NETINET_TCP_H
 
+#include <features.h>
+
 #define TCP_NODELAY 1
 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
 #include <sys/types.h>