diff --git a/src/common/tools/descriptor/Tools.py b/src/common/tools/descriptor/Tools.py
index 9d6275748e6e35eaf240f80f100e993334d4c5ea..f03c635b802e5c003a6ea80af46ef740b97e500b 100644
--- a/src/common/tools/descriptor/Tools.py
+++ b/src/common/tools/descriptor/Tools.py
@@ -72,7 +72,7 @@ def format_service_custom_config_rules(service : Dict) -> Dict:
     return service
 
 def format_slice_custom_config_rules(slice_ : Dict) -> Dict:
-    config_rules = slice_.get('service_config', {}).get('config_rules', [])
+    config_rules = slice_.get('slice_config', {}).get('config_rules', [])
     config_rules = format_custom_config_rules(config_rules)
     slice_['slice_config']['config_rules'] = config_rules
     return slice_