diff --git a/core/logic/PluginSys.cpp b/core/logic/PluginSys.cpp
index 47aa0e3e..0cab4bd7 100644
--- a/core/logic/PluginSys.cpp
+++ b/core/logic/PluginSys.cpp
@@ -30,6 +30,7 @@
  */
 
 #include <stdio.h>
+#include <stdarg.h>
 #include "PluginSys.h"
 #include "ShareSys.h"
 #include <ILibrarySys.h>