diff --git a/Rules.md b/Rules.md
index c80961b7..e35feba7 100644
--- a/Rules.md
+++ b/Rules.md
@@ -418,7 +418,7 @@ TESTS:
 * wait more than a minute without using the event temp and the thermostat will turn off as there is no temperature value (like a sensor error or disconnection)
 * will resume when using again the event temp
 
-#### 9. simple staircase timer
+#### 10. simple staircase timer
 **Rule:**
 
 `rule1 on button1#state do backlog power1 %value%; ruletimer1 600 endon on rules#timer=1 do power1 off endon`