diff --git a/rfcontrol/protocols/weather4.py b/rfcontrol/protocols/weather4.py
index d119975..bc641b7 100644
--- a/rfcontrol/protocols/weather4.py
+++ b/rfcontrol/protocols/weather4.py
@@ -64,7 +64,7 @@ def decode(pulses):
 
     decoded = {
         "id": int(binary[:8], 2),
-        "unit": int(binary[10:12], 2),
+        "unit": int(binary[36:40], 2),
         "temperature": temperature,
         "humidity": humidity,
         "lowBattery": lowBattery,