diff --git a/crypto777/inet.c b/crypto777/inet.c
index 87113f392..850ee6dee 100755
--- a/crypto777/inet.c
+++ b/crypto777/inet.c
@@ -19,6 +19,7 @@
 #ifndef crypto777_inet_h
 #define crypto777_inet_h
 #include "OS_portable.h"
+#include <arpa/inet.h>
 
 #ifdef _WIN32
 #define in6_addr sockaddr
diff --git a/iguana/iguana777.h b/iguana/iguana777.h
index 9e844484c..18e594bd3 100755
--- a/iguana/iguana777.h
+++ b/iguana/iguana777.h
@@ -31,6 +31,7 @@
 struct supernet_info;
 struct exchange_info;
 
+#include <arpa/inet.h>
 #include "../crypto777/OS_portable.h"
 #include "../datachain/datachain.h"