diff --git a/Include/AuroraEnum.hpp b/Include/AuroraEnum.hpp
index d062249..54aaaac 100644
--- a/Include/AuroraEnum.hpp
+++ b/Include/AuroraEnum.hpp
@@ -30,6 +30,12 @@ using AuString = std::string;
 using AuUInt = size_t;
 #endif
 
+#if !defined(AU_Consumer)
+#define AU_Consumer
+template<typename ...T>
+using AuConsumer = std::function<void(T...)>;
+#endif
+
 #endif
 
 ///////////////////////////////////////////////////////////////////////////////////////////