diff --git a/code_samples/catalog/custom_attribute_type/src/DependencyInjection/AddFloatStorageDefinitionTag.php b/code_samples/catalog/custom_attribute_type/src/DependencyInjection/AddFloatStorageDefinitionTag.php
new file mode 100644
index 0000000000..f9f55fa442
--- /dev/null
+++ b/code_samples/catalog/custom_attribute_type/src/DependencyInjection/AddFloatStorageDefinitionTag.php
@@ -0,0 +1,21 @@
+<?php
+/**
+ * @copyright Copyright (C) Ibexa AS. All rights reserved.
+ * @license For full copyright and license information view LICENSE file distributed with this source code.
+ */
+declare(strict_types=1);
+
+namespace App\DependencyInjection;
+
+use Ibexa\ProductCatalog\Local\Persistence\Legacy\Attribute\Float\StorageDefinition;
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+class AddFloatStorageDefinitionTag implements CompilerPassInterface
+{
+    public function process(ContainerBuilder $container): void
+    {
+        $container->getDefinition(StorageDefinition::class)
+            ->addTag('ibexa.product_catalog.attribute.storage_definition', ['type' => 'percent']);
+    }
+}
diff --git a/code_samples/catalog/custom_attribute_type/src/Kernel.php b/code_samples/catalog/custom_attribute_type/src/Kernel.php
new file mode 100644
index 0000000000..464772c47c
--- /dev/null
+++ b/code_samples/catalog/custom_attribute_type/src/Kernel.php
@@ -0,0 +1,20 @@
+<?php declare(strict_types=1);
+
+namespace App;
+
+use App\DependencyInjection\AddFloatStorageDefinitionTag;
+use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\HttpKernel\Kernel as BaseKernel;
+
+class Kernel extends BaseKernel
+{
+    use MicroKernelTrait;
+
+    public function build(ContainerBuilder $container): void
+    {
+        parent::build($container);
+
+        $container->addCompilerPass(new AddFloatStorageDefinitionTag());
+    }
+}
diff --git a/docs/pim/create_custom_attribute_type.md b/docs/pim/create_custom_attribute_type.md
index 71fd03254f..59eae5ebde 100644
--- a/docs/pim/create_custom_attribute_type.md
+++ b/docs/pim/create_custom_attribute_type.md
@@ -160,7 +160,9 @@ Register the converter as a service and tag it with `ibexa.product_catalog.attri
 
 ### Storage definition
 
-Next, prepare a `PercentStorageDefinition` class, which implements `Ibexa\Contracts\ProductCatalog\Local\Attribute\StorageDefinitionInterface`.
+You can either create a new storage definition or use an existing one.
+
+To create a new storage definition, prepare a `PercentStorageDefinition` class, which implements `Ibexa\Contracts\ProductCatalog\Local\Attribute\StorageDefinitionInterface`.
 
 ``` php
 [[= include_file('code_samples/catalog/custom_attribute_type/src/Attribute/Percent/Storage/PercentStorageDefinition.php') =]]
@@ -172,6 +174,18 @@ Register the storage definition as a service and tag it with `ibexa.product_cata
 [[= include_file('code_samples/catalog/custom_attribute_type/config/custom_services.yaml', 41, 44) =]]
 ```
 
+If you prefer to use an existing storage definition, you need to create a Storage Definition Tag CompilerPass `src/DependencyInjection/AddFloatStorageDefinitionTag.php`:
+
+``` php
+[[= include_file('code_samples/catalog/custom_attribute_type/src/DependencyInjection/AddFloatStorageDefinitionTag.php') =]]
+```
+
+Add the CompilerPass to the container. Do it in a `src/Kernel.php` file or in your Bundle class:
+
+``` php hl_lines="5 7-8 14-20"
+[[= include_file('code_samples/catalog/custom_attribute_type/src/Kernel.php') =]]
+```
+
 ## Use new attribute type
 
 In the back office you can now add a new Percent attribute to your product type and create a product with it.