diff --git a/CHANGELOG.md b/CHANGELOG.md
index 12ac28f..3d88d1b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## Version 2.0.0-alpha.19
+
+* Handle the potentially undefined tx.customData.txName field
+
 ## Version 2.0.0-alpha.18
 
 * Handle the partially linked Bytecode in the Truffle Adapter.
diff --git a/package.json b/package.json
index 9e89ffa..d6f5da4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@solarity/hardhat-migrate",
-  "version": "2.0.0-alpha.18",
+  "version": "2.0.0-alpha.19",
   "description": "Automatic deployment and verification of smart contracts",
   "main": "dist/src/index.js",
   "types": "dist/src/index.d.ts",
diff --git a/src/deployer/adapters/AbstractEthersAdapter.ts b/src/deployer/adapters/AbstractEthersAdapter.ts
index 5f699d3..7499f1f 100644
--- a/src/deployer/adapters/AbstractEthersAdapter.ts
+++ b/src/deployer/adapters/AbstractEthersAdapter.ts
@@ -15,6 +15,8 @@ import { MinimalContract } from "../MinimalContract";
 
 import "../../type-extensions";
 
+import { UNKNOWN_TRANSACTION_NAME } from "../../constants";
+
 import { bytecodeToString, fillParameters, getMethodString, getSignerHelper } from "../../utils";
 
 import { OverridesAndLibs, OverridesAndName } from "../../types/deployer";
@@ -187,9 +189,10 @@ export abstract class AbstractEthersAdapter extends Adapter {
     } as unknown as ContractTransactionResponse;
   }
 
+  // TODO: run normal migrations in tests.
   private _getKeyFieldsFromTransaction(tx: ContractTransaction): KeyTransactionFields {
     return {
-      name: tx.customData.txName,
+      name: this._getTransactionName(tx),
       data: tx.data,
       from: tx.from!,
       chainId: tx.chainId!,
@@ -197,4 +200,12 @@ export abstract class AbstractEthersAdapter extends Adapter {
       to: tx.to,
     };
   }
+
+  private _getTransactionName(tx: ContractTransaction): string {
+    if (tx.customData === undefined || tx.customData.txName === undefined) {
+      return UNKNOWN_TRANSACTION_NAME;
+    }
+
+    return tx.customData.txName;
+  }
 }