diff --git a/src/basic/missing_socket.h b/src/basic/missing_socket.h
index 8c3fec1e35..c4f33449a3 100644
--- a/src/basic/missing_socket.h
+++ b/src/basic/missing_socket.h
@@ -63,6 +63,10 @@ struct sockaddr_vm {
 #define IP_TRANSPARENT 19
 #endif
 
+#ifndef IPV6_FREEBIND
+#define IPV6_FREEBIND 78
+#endif
+
 /* linux/sockios.h */
 #ifndef SIOCGSKNS
 #define SIOCGSKNS 0x894C