diff --git a/qw/source/master.c b/qw/source/master.c
index dc886fd95..d17f1ba58 100644
--- a/qw/source/master.c
+++ b/qw/source/master.c
@@ -40,6 +40,9 @@ static const char rcsid[] =
 #ifdef HAVE_SYS_SOCKET_H
 # include <sys/socket.h>
 #endif
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
 #ifdef HAVE_ARPA_INET_H
 # include <arpa/inet.h>
 #endif