diff --git a/apstools/devices.py b/apstools/devices.py
index 4b2a14a75..9f53c2dd7 100644
--- a/apstools/devices.py
+++ b/apstools/devices.py
@@ -963,7 +963,7 @@ class AxisTunerException(ValueError):
     """Exception during execution of `AxisTunerBase` subclass"""
 
 
-class AxisTunerMixin(EpicsMotor):
+class AxisTunerMixin(DeviceMixinBase):
     """
     Mixin class to provide tuning capabilities for an axis