diff --git a/playbook/winpe-status-push.ps1 b/playbook/winpe-status-push.ps1
index ba7051e..302b6a2 100644
--- a/playbook/winpe-status-push.ps1
+++ b/playbook/winpe-status-push.ps1
@@ -23,7 +23,7 @@ function Log {
 }
 
 Log "=== winpe-status-push start ==="
-Log "server=$PxeServer:$Port  pctype=$PCType"
+Log "server=${PxeServer}:${Port}  pctype=$PCType"
 
 # Serial via wmic. Always available in WinPE 10+.
 $serial = ''