diff --git a/devices/undulator.py b/devices/undulator.py
index c503935..8aed941 100644
--- a/devices/undulator.py
+++ b/devices/undulator.py
@@ -96,8 +96,8 @@ class Undulator(PVAdjustable):
     def __init__(self, name, accuracy=0.0005):
         pvname_setvalue = name + ":K_SET"
         pvname_readback = name + ":K_READ"
-        super().__init__(pvname_setvalue, pvname_readback=pvname_readback, accuracy=accuracy, active_move=True, name=name)
-        self.adj_energy = PVAdjustable(name + ":FELPHOTENE")
+        super().__init__(pvname_setvalue, pvname_readback=pvname_readback, accuracy=accuracy, active_move=True, name=name, internal=True)
+        self.adj_energy = PVAdjustable(name + ":FELPHOTENE", internal=True)
 
     @property
     def energy(self):