diff --git a/src/Mapping/PropertyAccessors/EmbeddablePropertyAccessor.php b/src/Mapping/PropertyAccessors/EmbeddablePropertyAccessor.php
index 39e6fc3590..1cc3a50b47 100644
--- a/src/Mapping/PropertyAccessors/EmbeddablePropertyAccessor.php
+++ b/src/Mapping/PropertyAccessors/EmbeddablePropertyAccessor.php
@@ -6,6 +6,7 @@
 
 use Doctrine\Instantiator\Instantiator;
 
+/** @internal */
 class EmbeddablePropertyAccessor implements PropertyAccessor
 {
     private static Instantiator|null $instantiator = null;
diff --git a/src/Mapping/PropertyAccessors/EnumPropertyAccessor.php b/src/Mapping/PropertyAccessors/EnumPropertyAccessor.php
index 1cdcbf08ad..8c9033af60 100644
--- a/src/Mapping/PropertyAccessors/EnumPropertyAccessor.php
+++ b/src/Mapping/PropertyAccessors/EnumPropertyAccessor.php
@@ -10,6 +10,7 @@
 use function is_array;
 use function reset;
 
+/** @internal */
 class EnumPropertyAccessor implements PropertyAccessor
 {
     public function __construct(private PropertyAccessor $parent, private string $enumType)
diff --git a/src/Mapping/PropertyAccessors/ObjectCastPropertyAccessor.php b/src/Mapping/PropertyAccessors/ObjectCastPropertyAccessor.php
index 7babd0144a..38810f993a 100644
--- a/src/Mapping/PropertyAccessors/ObjectCastPropertyAccessor.php
+++ b/src/Mapping/PropertyAccessors/ObjectCastPropertyAccessor.php
@@ -9,6 +9,7 @@
 
 use function ltrim;
 
+/** @internal */
 class ObjectCastPropertyAccessor implements PropertyAccessor
 {
     public static function fromNames(string $class, string $name): self
diff --git a/src/Mapping/PropertyAccessors/PropertyAccessor.php b/src/Mapping/PropertyAccessors/PropertyAccessor.php
index c340e33431..7316d8a348 100644
--- a/src/Mapping/PropertyAccessors/PropertyAccessor.php
+++ b/src/Mapping/PropertyAccessors/PropertyAccessor.php
@@ -4,6 +4,7 @@
 
 namespace Doctrine\ORM\Mapping\PropertyAccessors;
 
+/** @internal */
 interface PropertyAccessor
 {
     public function setValue(object $object, mixed $value): void;
diff --git a/src/Mapping/PropertyAccessors/ReadonlyAccessor.php b/src/Mapping/PropertyAccessors/ReadonlyAccessor.php
index 56e60d0051..62faf6873d 100644
--- a/src/Mapping/PropertyAccessors/ReadonlyAccessor.php
+++ b/src/Mapping/PropertyAccessors/ReadonlyAccessor.php
@@ -10,6 +10,7 @@
 
 use function sprintf;
 
+/** @internal */
 class ReadonlyAccessor implements PropertyAccessor
 {
     public function __construct(private PropertyAccessor $parent, private ReflectionProperty $reflectionProperty)
diff --git a/src/Mapping/PropertyAccessors/TypedNoDefaultPropertyAccessor.php b/src/Mapping/PropertyAccessors/TypedNoDefaultPropertyAccessor.php
index a35ae5f14c..87850ad4b4 100644
--- a/src/Mapping/PropertyAccessors/TypedNoDefaultPropertyAccessor.php
+++ b/src/Mapping/PropertyAccessors/TypedNoDefaultPropertyAccessor.php
@@ -11,6 +11,7 @@
 use function assert;
 use function sprintf;
 
+/** @internal */
 class TypedNoDefaultPropertyAccessor implements PropertyAccessor
 {
     private Closure|null $unsetter = null;