diff --git a/portainer/api.py b/portainer/api.py
index 70c709a..e63d97a 100644
--- a/portainer/api.py
+++ b/portainer/api.py
@@ -972,7 +972,7 @@ class PortainerApi:
 
     def update_service(self):
         all_services = self.get_services(self.get_endpoint_id())
-        if self.args.DEBUG:
+        if self.args.debug:
             print(all_services)
         if len(all_services) == 0:
             print("No services found on this endpoint.")