diff --git a/Rules.md b/Rules.md
index 22741329..c7934ae6 100644
--- a/Rules.md
+++ b/Rules.md
@@ -110,7 +110,7 @@ To trigger only at TelePeriod time, prefix the sensor with the word `Tele-`.
 Trigger           | When it occurs |
 ------------------|-------------|
 |Tele-AM2301#Temperature|triggers on the TelePeriod time for the sensor AM2301|
-|Dsb18b20#Temperature<20| whenever the temperature of sensor DSB18B20 is below 20 degrees|
+|DS18B20#Temperature<20| whenever the temperature of sensor DS18B20 is below 20 degrees|
 |AM2301-12#Humidity==55.5| whenever the humidity of sensor AM2301-12 equals 55.5%|
 |INA219#Current>0.100| whenever the current drawn is more than 0.1A|
 |Energy#Power>100| whenever the power used is more than 100W|