diff --git a/Runtime/GuiSys/CGuiFunctionDef.hpp b/Runtime/GuiSys/CGuiFunctionDef.hpp
index 9f94acc67..029b43522 100644
--- a/Runtime/GuiSys/CGuiFunctionDef.hpp
+++ b/Runtime/GuiSys/CGuiFunctionDef.hpp
@@ -2,6 +2,7 @@
 #define __URDE_CGUIFUNCTIONDEF_HPP__
 
 #include "CGuiFuncParm.hpp"
+#include <array>
 
 namespace urde
 {