diff --git a/python/nav/portadmin/napalm/juniper.py b/python/nav/portadmin/napalm/juniper.py
index 17c955737d..ef2f927a4d 100644
--- a/python/nav/portadmin/napalm/juniper.py
+++ b/python/nav/portadmin/napalm/juniper.py
@@ -468,6 +468,8 @@ def set_poe_state(self, interface: manage.Interface, state: PoeState):
     def get_poe_states(
         self, interfaces: Sequence[manage.Interface] = None
     ) -> Dict[int, Optional[PoeState]]:
+        if interfaces is None:
+            interfaces = self.netbox.interfaces
         if len(interfaces) == 0:
             return {}
         elif len(interfaces) == 1: