diff --git a/libsndio/sio_aucat.c b/libsndio/sio_aucat.c
index e6b60fa..6d44f47 100644
--- a/libsndio/sio_aucat.c
+++ b/libsndio/sio_aucat.c
@@ -17,6 +17,7 @@
 
 #include <sys/types.h>
 #include <sys/socket.h>
+#include <arpa/inet.h>
 #include <sys/un.h>
 
 #include <errno.h>