diff --git a/esm.mjs b/esm.mjs
index dc6bd11c9..e7190a1b8 100644
--- a/esm.mjs
+++ b/esm.mjs
@@ -8,6 +8,7 @@ export const {
   createOption,
   CommanderError,
   InvalidArgumentError,
+  InvalidOptionArgumentError, // deprecated old name
   Command,
   Argument,
   Option,
diff --git a/tests/esm-imports-test.mjs b/tests/esm-imports-test.mjs
index 1ad478ac6..10ac8c722 100644
--- a/tests/esm-imports-test.mjs
+++ b/tests/esm-imports-test.mjs
@@ -1,4 +1,4 @@
-import { program, Command, Option, Argument, CommanderError, InvalidArgumentError, Help, createCommand, createArgument, createOption } from '../esm.mjs';
+import { program, Command, Option, Argument, CommanderError, InvalidArgumentError, InvalidOptionArgumentError, Help, createCommand, createArgument, createOption } from '../esm.mjs';
 
 // Do some simple checks that expected imports are available at runtime.
 // Run using `npm run test-esm`.
@@ -25,6 +25,7 @@ checkClass(new Command(), 'Command');
 checkClass(new Option('-e, --example'), 'Option');
 checkClass(new CommanderError(1, 'code', 'failed'), 'CommanderError');
 checkClass(new InvalidArgumentError('failed'), 'InvalidArgumentError');
+checkClass(new InvalidOptionArgumentError('failed'), 'InvalidArgumentError');
 checkClass(new Help(), 'Help');
 checkClass(new Argument('<file>'), 'Argument');