diff --git a/fftools/cmdutils.c b/fftools/cmdutils.c
--- a/fftools/cmdutils.c
+++ b/fftools/cmdutils.c
@@ -51,6 +51,8 @@
 #include "fopen_utf8.h"
 #include "opt_common.h"
 #ifdef _WIN32
+#define _WIN32_WINNT 0x0502
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include "compat/w32dlfcn.h"
 #endif