diff --git a/configure.in b/configure.in
index 49959d9a08a..4590a18a702 100644
--- a/configure.in
+++ b/configure.in
@@ -970,6 +970,7 @@ if test -n "$_WIN32_MSVC"; then
     AC_DEFINE(HAVE_IO_H)
     AC_DEFINE(HAVE_SETBUF)
     AC_DEFINE(HAVE_ISATTY)
+    AC_DEFINE(HAVE_STDCALL)
 fi
 
 fi # COMPILE_ENVIRONMENT