diff --git a/include/ehs/io/socket/ICMP_W32.h b/include/ehs/io/socket/ICMP_W32.h
index e960be7..377059d 100644
--- a/include/ehs/io/socket/ICMP_W32.h
+++ b/include/ehs/io/socket/ICMP_W32.h
@@ -9,6 +9,13 @@
 
 namespace ehs
 {
+	struct PseudoICMPv6_Header
+	{
+		sockaddr_in6 src;
+		sockaddr_in6 dst;
+		UInt_32 length;
+	};
+
 	class ICMP : public BaseICMP
 	{
 	private: