diff --git a/modules/ppcp-axo/src/Helper/CompatibilityChecker.php b/modules/ppcp-axo/src/Helper/CompatibilityChecker.php
index f06b3e144..1c7cba46e 100644
--- a/modules/ppcp-axo/src/Helper/CompatibilityChecker.php
+++ b/modules/ppcp-axo/src/Helper/CompatibilityChecker.php
@@ -16,6 +16,8 @@ use WooCommerce\PayPalCommerce\WcGateway\Exception\NotFoundException;
 
 /**
  * Class CompatibilityChecker
+ *
+ * DI service: 'axo.helpers.compatibility-checker'
  */
 class CompatibilityChecker {
 	/**
diff --git a/modules/ppcp-wc-gateway/src/Helper/DCCGatewayConfiguration.php b/modules/ppcp-wc-gateway/src/Helper/DCCGatewayConfiguration.php
index a59dd3e8b..59b3b88ee 100644
--- a/modules/ppcp-wc-gateway/src/Helper/DCCGatewayConfiguration.php
+++ b/modules/ppcp-wc-gateway/src/Helper/DCCGatewayConfiguration.php
@@ -23,7 +23,7 @@ use WooCommerce\PayPalCommerce\Axo\Helper\PropertiesDictionary;
  * This class should not implement business logic, but only provide a convenient
  * way to access gateway settings by wrapping the Settings instance.
  *
- * DI container: 'wcgateway.configuration.dcc'
+ * DI service: 'wcgateway.configuration.dcc'
  */
 class DCCGatewayConfiguration {
 	/**