diff --git a/src/netbios_ns.c b/src/netbios_ns.c
index 66ac94b..38834c7 100644
--- a/src/netbios_ns.c
+++ b/src/netbios_ns.c
@@ -52,6 +52,8 @@
 #ifdef _WIN32
 # include <winsock2.h>
 # include <ws2tcpip.h>
+#else
+# include <sys/socket.h>
 #endif
 
 #include <bdsm/netbios_ns.h>
diff --git a/src/netbios_session.c b/src/netbios_session.c
index 1a45fc4..f43ded0 100644
--- a/src/netbios_session.c
+++ b/src/netbios_session.c
@@ -39,6 +39,9 @@
 #ifdef HAVE_ARPA_INET_H
 #include <arpa/inet.h>
 #endif
+#ifndef _WIN32
+#include <sys/socket.h>
+#else
 
 #include "bdsm_debug.h"
 #include "netbios_session.h"