diff --git a/docs/pws-protocol.md b/docs/pws-protocol.md
index ab1ba34..6cecbcc 100644
--- a/docs/pws-protocol.md
+++ b/docs/pws-protocol.md
@@ -34,7 +34,7 @@ _[To Do: If the weather station is not capable of producing a timestamp then eit
 
 Here is an example of a full URL:
 ```
-https://<Local Weather Service IP:Port>/weatherstation/updateweatherstation.php?tempf=70.5&humidity=90&rainin=0&dailytainin=0.54&dateutc=2000-01-01+10%3A32%3A35
+https://<Local Weather Service IP:Port>/weatherstation/updateweatherstation.php?tempf=70.5&humidity=90&rainin=0&dailyrainin=0.54&dateutc=2000-01-01+10%3A32%3A35
 ```
 The response text from the Weather Service server will be either "`success`" or an error message.