diff --git a/homeassistant/components/climate/nest.py b/homeassistant/components/climate/nest.py
index 01c3b3782b11b70c8592f88df94e70039f23e417..06ec500f9e2958c333521a626f5ce77928421e20 100644
--- a/homeassistant/components/climate/nest.py
+++ b/homeassistant/components/climate/nest.py
@@ -229,7 +229,7 @@ class NestThermostat(ClimateDevice):
         self._eco_temperature = self.device.eco_temperature
         self._locked_temperature = self.device.locked_temperature
         self._is_locked = self.device.is_locked
-        if self.device.temperature == 'C':
+        if self.device.temperature_scale == 'C':
             self._temperature_scale = TEMP_CELSIUS
         else:
             self._temperature_scale = TEMP_FAHRENHEIT