diff --git a/apstools/devices/labjack.py b/apstools/devices/labjack.py
index ac299f6ee..0f75e9b98 100644
--- a/apstools/devices/labjack.py
+++ b/apstools/devices/labjack.py
@@ -78,7 +78,11 @@ class Input(EpicsRecordInputFields, EpicsRecordDeviceCommonAll):
 
 
 class Output(EpicsRecordOutputFields, EpicsRecordDeviceCommonAll):
-    pass
+    """A generic output record.
+
+    Intended to be sub-classed into different output types.
+
+    """
 
 
 class BinaryOutput(Output):
@@ -95,8 +99,6 @@ class BinaryOutput(Output):
 class AnalogOutput(Output):
     """An analog output on a labjack device."""
 
-    pass
-
 
 class AnalogInput(Input):
     """An analog input on a labjack device.