diff --git a/CHANGELOG.md b/CHANGELOG.md
index dacf21bfd6be..1405d1269733 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ## Changelog
 ##### Unreleased
+- Fixed `Object#toString` on `AggregateError` in IE10-
 - `.findLast` methods family marked as supported [from Chrome 97](https://chromestatus.com/features#milestone%3D97)
 - Fixed inheritance of Electron compat data `web.` modules
 - Fixed Safari 15.1 compat data (some features were not added)
diff --git a/packages/core-js/modules/es.aggregate-error.js b/packages/core-js/modules/es.aggregate-error.js
index ea8dfefc6287..db20e13da535 100644
--- a/packages/core-js/modules/es.aggregate-error.js
+++ b/packages/core-js/modules/es.aggregate-error.js
@@ -12,17 +12,23 @@ var clearErrorStack = require('../internals/clear-error-stack');
 var installErrorCause = require('../internals/install-error-cause');
 var iterate = require('../internals/iterate');
 var normalizeStringArgument = require('../internals/normalize-string-argument');
+var wellKnownSymbol = require('../internals/well-known-symbol');
 var ERROR_STACK_INSTALLABLE = require('../internals/error-stack-installable');
 
+var TO_STRING_TAG = wellKnownSymbol('toStringTag');
 var Error = global.Error;
 var push = [].push;
 
 var $AggregateError = function AggregateError(errors, message /* , options */) {
   var options = arguments.length > 2 ? arguments[2] : undefined;
   var isInstance = isPrototypeOf(AggregateErrorPrototype, this);
-  var that = setPrototypeOf
-    ? setPrototypeOf(new Error(undefined), isInstance ? getPrototypeOf(this) : AggregateErrorPrototype)
-    : isInstance ? this : create(AggregateErrorPrototype);
+  var that;
+  if (setPrototypeOf) {
+    that = setPrototypeOf(new Error(undefined), isInstance ? getPrototypeOf(this) : AggregateErrorPrototype);
+  } else {
+    that = isInstance ? this : create(AggregateErrorPrototype);
+    createNonEnumerableProperty(that, TO_STRING_TAG, 'Error');
+  }
   createNonEnumerableProperty(that, 'message', normalizeStringArgument(message, ''));
   if (ERROR_STACK_INSTALLABLE) createNonEnumerableProperty(that, 'stack', clearErrorStack(that.stack, 1));
   installErrorCause(that, options);
diff --git a/tests/pure/es.aggregate-error.js b/tests/pure/es.aggregate-error.js
index 0a3018ec7fbf..5cd4dd83aa0f 100644
--- a/tests/pure/es.aggregate-error.js
+++ b/tests/pure/es.aggregate-error.js
@@ -1,5 +1,6 @@
 import AggregateError from 'core-js-pure/es/aggregate-error';
 import Symbol from 'core-js-pure/es/symbol';
+import toString from 'core-js-pure/es/object/to-string';
 
 QUnit.test('AggregateError', assert => {
   assert.isFunction(AggregateError);
@@ -14,4 +15,5 @@ QUnit.test('AggregateError', assert => {
   assert.same(AggregateError([1]).message, '');
   assert.deepEqual(AggregateError([1, 2, 3]).errors, [1, 2, 3]);
   assert.throws(() => AggregateError([1], Symbol()), 'throws on symbol as a message');
+  assert.same(toString(AggregateError([1])), '[object Error]', 'Object#toString');
 });
diff --git a/tests/tests/es.aggregate-error.js b/tests/tests/es.aggregate-error.js
index f4eee804a01d..430d0840ef56 100644
--- a/tests/tests/es.aggregate-error.js
+++ b/tests/tests/es.aggregate-error.js
@@ -12,4 +12,5 @@ QUnit.test('AggregateError', assert => {
   assert.same(AggregateError([1]).message, '');
   assert.deepEqual(AggregateError([1, 2, 3]).errors, [1, 2, 3]);
   assert.throws(() => AggregateError([1], Symbol()), 'throws on symbol as a message');
+  assert.same(({}).toString.call(AggregateError([1])), '[object Error]', 'Object#toString');
 });