diff --git a/RpcSystemAssetTracker/UserSystemAssetCoinOutputsKey.cs b/RpcSystemAssetTracker/UserSystemAssetCoinOutputsKey.cs
index 7f0cad859..3e4439b50 100644
--- a/RpcSystemAssetTracker/UserSystemAssetCoinOutputsKey.cs
+++ b/RpcSystemAssetTracker/UserSystemAssetCoinOutputsKey.cs
@@ -25,8 +25,8 @@ public override bool Equals(object obj)
         {
             if (ReferenceEquals(null, obj)) return false;
             if (ReferenceEquals(this, obj)) return true;
-            if (obj.GetType() != this.GetType()) return false;
-            return Equals((UserSystemAssetCoinOutputsKey) obj);
+            if (!(obj is UserSystemAssetCoinOutputsKey b)) return false;
+            return Equals(b);
         }
 
         public int CompareTo(UserSystemAssetCoinOutputsKey other)