diff --git a/Export-Excel.ps1 b/Export-Excel.ps1
index 3b97528..84eaf51 100644
--- a/Export-Excel.ps1
+++ b/Export-Excel.ps1
@@ -56,6 +56,7 @@ function Export-Excel {
     )
 
     Begin {
+    	$script:Header = $null
         if($KillExcel) {
             Get-Process excel -ErrorAction Ignore | Stop-Process
             while (Get-Process excel -ErrorAction Ignore) {}