diff --git a/error-constructors.d.ts b/error-constructors.d.ts
index ec487a7..91a926c 100644
--- a/error-constructors.d.ts
+++ b/error-constructors.d.ts
@@ -1,10 +1,8 @@
+type BaseErrorConstructor = new (message?: string, ...arguments_: unknown[]) => Error;
+
 /**
 Let `serialize-error` know about your custom error constructors so that when `{name: 'MyCustomError', message: 'It broke'}` is found, it uses the right error constructor. If "MyCustomError" isn't found in the global list of known constructors, it defaults to the base `Error` error constructor.
 
 Warning: The constructor must work without any arguments or this function will throw.
 */
-
-type BaseErrorConstructor = new (message?: string, ...arguments_: unknown[]) => Error;
-declare function addKnownErrorConstructor(constructor: BaseErrorConstructor): void;
-
-export {addKnownErrorConstructor};
+export function addKnownErrorConstructor(constructor: BaseErrorConstructor): void;
diff --git a/error-constructors.js b/error-constructors.js
index 99938f0..a2ad070 100644
--- a/error-constructors.js
+++ b/error-constructors.js
@@ -26,16 +26,16 @@ const list = [
 export const errorConstructors = new Map(list);
 
 export function addKnownErrorConstructor(constructor) {
-	const {name} = constructor;
-	if (errorConstructors.has(name)) {
-		throw new Error(`The error constructor "${name}" is already known.`);
-	}
-
+	let instance;
 	try {
-		// eslint-disable-next-line no-new -- It just needs to be verified
-		new constructor();
+		instance = new constructor();
 	} catch (error) {
-		throw new Error(`The error constructor "${name}" is not compatible`, {cause: error});
+		throw new Error(`The error constructor "${constructor.name}" is not compatible`, {cause: error});
+	}
+
+	const {name} = instance;
+	if (errorConstructors.has(name)) {
+		throw new Error(`The error constructor "${name}" is already known.`);
 	}
 
 	errorConstructors.set(name, constructor);
diff --git a/test.js b/test.js
index 19a080d..92a5a81 100644
--- a/test.js
+++ b/test.js
@@ -295,6 +295,32 @@ test('should not allow adding incompatible or redundant error constructors', t =
 	}, {message: 'The error constructor "BadError" is not compatible'});
 });
 
+test('should handle minified constructors correctly using instance name', t => {
+	class CustomError extends Error {
+		constructor(message) {
+			super(message);
+			this.name = 'CustomError';
+		}
+	}
+
+	// Simulate minification by changing constructor name
+	Object.defineProperty(CustomError, 'name', {
+		value: 'a', // Minified name
+		configurable: true,
+	});
+
+	addKnownErrorConstructor(CustomError);
+
+	const error = new CustomError('test message');
+	const serialized = serializeError(error);
+	t.is(serialized.name, 'CustomError');
+
+	const deserialized = deserializeError(serialized);
+	t.true(deserialized instanceof CustomError);
+	t.is(deserialized.name, 'CustomError');
+	t.is(deserialized.message, 'test message');
+});
+
 test('should deserialize plain object', t => {
 	const object = {
 		message: 'error message',