diff --git a/Scripts/switch-shelly1.ps1 b/Scripts/switch-shelly1.ps1
index 6a9b20af..17e5715b 100755
--- a/Scripts/switch-shelly1.ps1
+++ b/Scripts/switch-shelly1.ps1
@@ -6,11 +6,11 @@
 .NOTES		Author:	Markus Fleschutz / License: CC0
 #>
 
-param($IPaddr = "", $TurnMode = "", [int]$Timer = -999)
+param($IPaddress = "", $TurnMode = "", [int]$Timer = -999)
 
 try {
-	if ($IPaddr -eq "") {
-		$IPaddr = read-host "Enter IP address of the Shelly1 device"
+	if ($IPaddress -eq "") {
+		$IPaddress = read-host "Enter IP address of the Shelly1 device"
 	}
 	if ($TurnMode -eq "") {
 		$TurnMode = read-host "Enter turn mode (on/off/toggle)"
@@ -19,9 +19,9 @@ try {
 		[int]$Timer = read-host "Enter timer in seconds (0=endless)"
 	}
 
-	$Result = Invoke-RestMethod "http://$($IPaddr)/relay/0?turn=$($TurnMode)&timer=$($Timer)"
+	$Result = Invoke-RestMethod "http://$($IPaddress)/relay/0?turn=$($TurnMode)&timer=$($Timer)"
 	
-	write-host -foregroundColor green "Done - switched Shelly1 device at $IPaddr to $TurnMode for $Timer second(s)"
+	write-host -foregroundColor green "Done - switched Shelly1 device at $IPaddress to $TurnMode for $Timer second(s)"
 	exit 0
 } catch {
 	write-error "ERROR: line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"