diff --git a/m4/my_windows_api.m4 b/m4/my_windows_api.m4
index 3404cdb0..e24481b7 100644
--- a/m4/my_windows_api.m4
+++ b/m4/my_windows_api.m4
@@ -10,6 +10,8 @@ AC_DEFUN([MY_WINDOWS_API],
 	AC_MSG_RESULT([$Windows_API])
 	if test $Windows_API = yes; then
 		AC_DEFINE([WINDOWS], 1, [Define if compiling for Windows API])
+		AC_DEFINE([WIN32_LEAN_AND_MEAN], 1,
+			[Define to make Windows includes pull in less junk])
 		LIBS_SOCKETS="-lws2_32"
 	else
 		LIBS_SOCKETS=
diff --git a/src/lib/w32/posixio.c b/src/lib/w32/posixio.c
index 0f69f768..45a379cf 100644
--- a/src/lib/w32/posixio.c
+++ b/src/lib/w32/posixio.c
@@ -49,8 +49,9 @@
 #include <fcntl.h>
 #include <io.h>
 #include <share.h>
-#include <stdio.h>
 #include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
 /*
  * Need to include winsock2.h before ws2tcpip.h.
  * Use sys/socket.h to ensure the #undef NS_ALL