--- libcaf_io/src/io/network/default_multiplexer.cpp.orig	2020-04-05 00:30:36 UTC

+++ libcaf_io/src/io/network/default_multiplexer.cpp

@@ -59,6 +59,9 @@

 #  include <ws2ipdef.h>

 #  include <ws2tcpip.h>

 #else

+#  ifdef __FreeBSD__

+#    include <sys/types.h>

+#  endif

 #  include <arpa/inet.h>

 #  include <cerrno>

 #  include <fcntl.h>

--- libcaf_io/src/io/network/ip_endpoint.cpp.orig	2020-04-05 00:36:43 UTC

+++ libcaf_io/src/io/network/ip_endpoint.cpp

@@ -30,6 +30,9 @@

 #  include <ws2tcpip.h>

 #  include <ws2ipdef.h>

 #else

+#  ifdef __FreeBSD__

+#    include <sys/types.h>

+#  endif

 #  include <arpa/inet.h>

 #  include <cerrno>

 #  include <netinet/in.h>

--- libcaf_io/src/io/network/native_socket.cpp.orig	2020-04-05 00:18:01 UTC

+++ libcaf_io/src/io/network/native_socket.cpp

@@ -44,6 +44,9 @@

 #  include <ws2ipdef.h>

 #  include <ws2tcpip.h>

 #else

+#  ifdef __FreeBSD__

+#    include <sys/types.h>

+#  endif

 #  include <arpa/inet.h>

 #  include <cerrno>

 #  include <fcntl.h>