diff --git a/ethers-core/src/main/kotlin/io/ethers/core/types/transaction/Transaction.kt b/ethers-core/src/main/kotlin/io/ethers/core/types/transaction/Transaction.kt
index 19b7f166..4064064b 100644
--- a/ethers-core/src/main/kotlin/io/ethers/core/types/transaction/Transaction.kt
+++ b/ethers-core/src/main/kotlin/io/ethers/core/types/transaction/Transaction.kt
@@ -70,7 +70,7 @@ sealed class TxType(val type: Int) {
         }
 
         override fun toString(): String {
-            return "Unknown(type=$type)"
+            return "Unsupported(type=$type)"
         }
     }