diff --git a/CHANGELOG.md b/CHANGELOG.md
index 036d4bc04..a3ea2779f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@
 - Bug #561: Fix `ActiveRecordInterface::upsert()` with `$updateProperties = false` (@Tigrov)
 - Bug #550: Relation query should be created by related class, not primary model class (@batyrmastyr)
 - Enh #571: Optimize performance of `ActiveRecord::get()` method (@Tigrov)
+- Enh #575: Remove check for empty string in `AbstractActiveRecord::markPropertyChanged()` method (@Tigrov)
 
 ## 1.0.2 March 11, 2026
 
diff --git a/src/AbstractActiveRecord.php b/src/AbstractActiveRecord.php
index 985f8d90c..511e629cd 100644
--- a/src/AbstractActiveRecord.php
+++ b/src/AbstractActiveRecord.php
@@ -391,7 +391,7 @@ public function link(string $relationName, ActiveRecordInterface $linkModel, arr
 
     public function markPropertyChanged(string $name): void
     {
-        if ($this->oldValues !== null && $name !== '') {
+        if ($this->oldValues !== null) {
             unset($this->oldValues[$name]);
         }
     }
diff --git a/tests/ActiveRecordTest.php b/tests/ActiveRecordTest.php
index 15f72702f..83d7c0b77 100644
--- a/tests/ActiveRecordTest.php
+++ b/tests/ActiveRecordTest.php
@@ -1805,6 +1805,16 @@ public function testMarkPropertyChanged(): void
         $this->assertSame($expectedAffectedRows, $affectedRows);
     }
 
+    public function testMarkPropertyChangedWithEmptyName()
+    {
+        $model = new NullValues();
+        $model->assignOldValues(['' => 'empty name', 'name' => 'Vasya']);
+
+        $model->markPropertyChanged('');
+
+        $this->assertSame(['name' => 'Vasya'], $model->oldValues());
+    }
+
     public function testResetsIntermediateViaRelationWhenLinkPropertyChanges(): void
     {
         $order = OrderWithCustomerProfileViaCustomerRelation::query()->findByPk(1);