diff --git a/include/enet/unix.h b/include/enet/unix.h
index 6aae21a..3076faa 100644
--- a/include/enet/unix.h
+++ b/include/enet/unix.h
@@ -8,6 +8,7 @@
 #include <stdlib.h>
 #include <sys/time.h>
 #include <sys/types.h>
+#include <sys/socket.h>
 #include <netinet/in.h>
 #include <unistd.h>