diff --git a/miio/airpurifier.py b/miio/airpurifier.py
index 96168804a..217276fc5 100644
--- a/miio/airpurifier.py
+++ b/miio/airpurifier.py
@@ -319,6 +319,7 @@ def __repr__(self) -> str:
             "extra_features=%s, " \
             "turbo_mode_supported=%s, " \
             "auto_detect=%s, " \
+            "use_time=%s, " \
             "button_pressed=%s>" % \
             (self.power,
              self.aqi,
@@ -349,6 +350,7 @@ def __repr__(self) -> str:
              self.extra_features,
              self.turbo_mode_supported,
              self.auto_detect,
+             self.use_time,
              self.button_pressed)
         return s