diff --git a/klippy/extras/htu21d.py b/klippy/extras/htu21d.py
index 68299418..52e2f75e 100644
--- a/klippy/extras/htu21d.py
+++ b/klippy/extras/htu21d.py
@@ -199,7 +199,7 @@ class HTU21D:
                 if (self.humidity < 0):
                     #due to RH accuracy, measured value might be
                     # slightly less than 0 or more 100
-                    self.temp = 0
+                    self.humidity = 0
                 elif (self.humidity > 100):
                     self.humidity = 100
                 # Only for HTU21D & SHT21.