diff --git a/python/pyrogue/_DataReceiver.py b/python/pyrogue/_DataReceiver.py
index 9bb431c62..936352f39 100644
--- a/python/pyrogue/_DataReceiver.py
+++ b/python/pyrogue/_DataReceiver.py
@@ -88,7 +88,7 @@ def _acceptFrame(self, frame):
 
         """
         # Do nothing if not yet started or enabled
-        if self.running is False or self.RxEnable.value() is False:
+        if self.running is False or self.RxEnable.value() == False:
             return
 
         # Lock frame
diff --git a/python/pyrogue/_Device.py b/python/pyrogue/_Device.py
index cc0bde492..3962bb113 100644
--- a/python/pyrogue/_Device.py
+++ b/python/pyrogue/_Device.py
@@ -31,6 +31,8 @@ def __init__(self, *, enabled, deps=None):
             groups='Enable',
             disp={False: 'False', True: 'True', 'parent': 'ParentFalse', 'deps': 'ExtDepFalse'})
 
+        self.allowed_values = {True, False, 'parent', 'deps'}
+
         if deps is None:
             self._deps   = []
             self._depDis = False
@@ -97,6 +99,10 @@ def set(self, value, write=True, index=-1):
         -------
 
         """
+        if value not in self.allowed_values:
+            raise pr.VariableError(
+                f'Error calling {self.path}.set({value=}) - value must be one of {self.allowed_values}')
+        
         if value != 'parent' and value != 'deps':
             old = self.value()