diff --git a/CHANGELOG.md b/CHANGELOG.md
index 51e6d36b4da6..d1b92e60029d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,7 @@ IMPROVEMENTS:
 * `azurerm_dns_zone` - datasource's `resource_group` field is now optional [GH-1180]
 * `azurerm_mysql_database` - ignoring casing for the `charset` field [GH-1281]
 * `azurerm_mysql_server` - support for the new GA Pricing SKU's [GH-1154]
+* `azurerm_postgresql_database` - ignoring the casing on the `collation` field [GH-1255]
 * `azurerm_postgresql_server` - support for the new GA Pricing SKU's [GH-1190]
 * `azurerm_public_ip` - computed values now default to an empy string [GH-1247]
 * `azurerm_servicebus_queue` - adding `dead_lettering_on_message_expiration` [GH-1235]