diff --git a/CHANGELOG.md b/CHANGELOG.md
index efdb5c2f7e..073be3f643 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 - Fixed a bug where shipping categories for other stores were showing up for selection on the Edit Product screen. ([#3690](https://github.com/craftcms/commerce/issues/3690))
 - Fixed a bug where tax categories that were not available to the product type were showing up for selection on the Edit Product screen. ([#3690](https://github.com/craftcms/commerce/issues/3690))
 - Fixed a bug where the store name was being displayed twice on the Edit Order screen.
+- Fixed a bug where the `CatalogPricingRule::$description` property was not being populated. ([#3699](https://github.com/craftcms/commerce/issues/3699))
 
 ## 5.1.2 - 2024-09-19
 
diff --git a/src/models/CatalogPricingRule.php b/src/models/CatalogPricingRule.php
index 547871a641..c2db738a1c 100644
--- a/src/models/CatalogPricingRule.php
+++ b/src/models/CatalogPricingRule.php
@@ -164,6 +164,7 @@ protected function defineRules(): array
                 'customerCondition',
                 'dateFrom',
                 'dateTo',
+                'description',
                 'id',
                 'isPromotionalPrice',
                 'metadata',