diff --git a/packages/core-js/actual/array/group-by-to-map.js b/packages/core-js/actual/array/group-by-to-map.js
index a3eda27753cc..b374eebb521b 100644
--- a/packages/core-js/actual/array/group-by-to-map.js
+++ b/packages/core-js/actual/array/group-by-to-map.js
@@ -1,4 +1,5 @@
 require('../../modules/es.map');
+require('../../modules/es.object.to-string');
 require('../../modules/esnext.array.group-by-to-map');
 var entryUnbind = require('../../internals/entry-unbind');
 
diff --git a/packages/core-js/actual/array/index.js b/packages/core-js/actual/array/index.js
index 3a930777279d..70b5bcf0de4d 100644
--- a/packages/core-js/actual/array/index.js
+++ b/packages/core-js/actual/array/index.js
@@ -1,5 +1,6 @@
 var parent = require('../../stable/array');
 require('../../modules/es.map');
+require('../../modules/es.object.to-string');
 require('../../modules/esnext.array.find-last');
 require('../../modules/esnext.array.find-last-index');
 require('../../modules/esnext.array.group-by');
diff --git a/packages/core-js/actual/array/virtual/group-by-to-map.js b/packages/core-js/actual/array/virtual/group-by-to-map.js
index 8c6d70200718..e53491f4ebee 100644
--- a/packages/core-js/actual/array/virtual/group-by-to-map.js
+++ b/packages/core-js/actual/array/virtual/group-by-to-map.js
@@ -1,4 +1,5 @@
 require('../../../modules/es.map');
+require('../../../modules/es.object.to-string');
 require('../../../modules/esnext.array.group-by-to-map');
 var entryVirtual = require('../../../internals/entry-virtual');
 
diff --git a/packages/core-js/actual/array/virtual/index.js b/packages/core-js/actual/array/virtual/index.js
index f19096351632..778f564bd0b5 100644
--- a/packages/core-js/actual/array/virtual/index.js
+++ b/packages/core-js/actual/array/virtual/index.js
@@ -1,5 +1,6 @@
 var parent = require('../../../stable/array/virtual');
 require('../../../modules/es.map');
+require('../../../modules/es.object.to-string');
 require('../../../modules/esnext.array.find-last');
 require('../../../modules/esnext.array.find-last-index');
 require('../../../modules/esnext.array.group-by');