diff --git a/control/lti.py b/control/lti.py
index cccb44a63..e631a6213 100644
--- a/control/lti.py
+++ b/control/lti.py
@@ -120,7 +120,8 @@ def frequency_response(self, omega=None, squeeze=None):
         response = self(s)
         return FrequencyResponseData(
             response, omega, return_magphase=True, squeeze=squeeze,
-            dt=self.dt, sysname=self.name, plot_type='bode')
+            dt=self.dt, sysname=self.name, inputs=self.input_labels,
+            outputs=self.output_labels, plot_type='bode')
 
     def dcgain(self):
         """Return the zero-frequency gain"""