diff --git a/miio/airfresh_t2017.py b/miio/airfresh_t2017.py
index 7548eee46..252c353c1 100644
--- a/miio/airfresh_t2017.py
+++ b/miio/airfresh_t2017.py
@@ -319,7 +319,7 @@ def set_display_orientation(self, orientation: DisplayOrientation):
     @command(
         click.argument("ptc", type=bool),
         default_output=format_output(
-            lambda led: "Turning on ptc" if led else "Turning off ptc"
+            lambda ptc: "Turning on ptc" if ptc else "Turning off ptc"
         ),
     )
     def set_ptc(self, ptc: bool):