--- src/common/os.h.orig	2009-05-09 09:08:44.000000000 +0000
+++ src/common/os.h	2009-05-17 16:33:01.144075039 +0000
@@ -141,4 +141,6 @@
 void MTX_DLL_API create_directory(const char *path);
 int64_t MTX_DLL_API get_current_time_millis();
 
+#include <stdarg.h>
+
 #endif