diff --git a/include/nana/detail/linux_X11/msg_packet.hpp b/include/nana/detail/linux_X11/msg_packet.hpp
new file mode 100644
index 00000000..b1fc3dec
--- /dev/null
+++ b/include/nana/detail/linux_X11/msg_packet.hpp
@@ -0,0 +1,32 @@
+#ifndef NANA_DETAIL_MSG_PACKET_HPP
+#define NANA_DETAIL_MSG_PACKET_HPP
+#include <X11/Xlib.h>
+#include <vector>
+#include <nana/deploy.hpp>
+
+namespace nana
+{
+namespace detail
+{
+	struct msg_packet_tag
+	{
+		enum kind_t{kind_xevent, kind_mouse_drop, kind_cleanup};
+		kind_t kind;
+		union
+		{
+			XEvent xevent;
+
+			Window packet_window; //Avaiable if the packet is not kind_xevent
+			struct mouse_drop_tag
+			{
+				Window window;
+				int x;
+				int y;
+				std::vector<nana::string> * files;
+			}mouse_drop;
+		}u;
+	};
+}//end namespace detail
+}//end namespace nana
+#endif
+