diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3e683a6ed54..ee1a12b723d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## Unreleased
 
 - Fixed a bug where field conditions weren’t taking effect within Matrix fields set to inline-editable blocks mode, if the owner element didn’t support drafts. ([#16315](https://github.com/craftcms/cms/pull/16315))
+- Fixed a bug where Matrix fields’ entry types weren’t maintaining their original block type order when upgrading to Craft 5. ([#16314](https://github.com/craftcms/cms/issues/16314))
 
 ## 5.5.6.1 - 2024-12-11
 
diff --git a/src/migrations/m230617_070415_entrify_matrix_blocks.php b/src/migrations/m230617_070415_entrify_matrix_blocks.php
index ecc8766669d..2817754324f 100644
--- a/src/migrations/m230617_070415_entrify_matrix_blocks.php
+++ b/src/migrations/m230617_070415_entrify_matrix_blocks.php
@@ -15,6 +15,7 @@
 use craft\models\EntryType;
 use craft\models\FieldLayout;
 use craft\services\ProjectConfig;
+use Illuminate\Support\Arr;
 use yii\db\Exception as DbException;
 use yii\helpers\Inflector;
 
@@ -90,8 +91,13 @@ public function safeUp(): bool
         foreach ($fieldConfigs as $fieldPath => $fieldConfig) {
             $fieldUid = ArrayHelper::lastValue(explode('.', $fieldPath));
             $fieldEntryTypes = [];
+            $blockTypeConfigsByField[$fieldUid] ??= [];
+            $blockTypeConfigsByField[$fieldUid] = Arr::sort(
+                $blockTypeConfigsByField[$fieldUid],
+                fn(array $config) => $config['sortOrder'] ?? 0,
+            );
 
-            foreach ($blockTypeConfigsByField[$fieldUid] ?? [] as $blockTypeUid => $blockTypeConfig) {
+            foreach ($blockTypeConfigsByField[$fieldUid] as $blockTypeUid => $blockTypeConfig) {
                 $entryType = $newEntryTypes[] = $fieldEntryTypes[] = new EntryType([
                     'uid' => $blockTypeUid,
                     'name' => $this->uniqueName($blockTypeConfig['name'], $entryTypeNames),