diff --git a/Giselle.Net.EtherNetIP/IPAddressUtils.cs b/Giselle.Net.EtherNetIP/IPAddressUtils.cs
index 0e876e9..f33e7b4 100644
--- a/Giselle.Net.EtherNetIP/IPAddressUtils.cs
+++ b/Giselle.Net.EtherNetIP/IPAddressUtils.cs
@@ -38,7 +38,7 @@ public static IPAddress ToIPv4Address(this int address, bool isBigEndian = true)
 
         public static int ToIPv4Address(this IPAddress address, bool isBigEndian = true)
         {
-            var bytes = address.GetAddressBytes();
+            var bytes = address.MapToIPv4().GetAddressBytes();
             int value = 0;
 
             if (isBigEndian == true)