diff --git a/aucat/sock.c b/aucat/sock.c
index 8f4a02d..d11fbe0 100644
--- a/aucat/sock.c
+++ b/aucat/sock.c
@@ -17,6 +17,7 @@
 
 #include <sys/types.h>
 #include <sys/socket.h>
+#include <netinet/in.h>
 #include <arpa/inet.h>
 #include <unistd.h>
 #include <stdio.h>
diff --git a/sndiod/sock.c b/sndiod/sock.c
index 05a9551..c51b72a 100644
--- a/sndiod/sock.c
+++ b/sndiod/sock.c
@@ -25,6 +25,7 @@
  */
 
 #include <sys/types.h>
+#include <netinet/in.h>
 #include <arpa/inet.h>
 #include <errno.h>
 #include <poll.h>