diff --git a/windows/win_nssm.ps1 b/windows/win_nssm.ps1
index bf4e798fca5..fa61afdaafc 100644
--- a/windows/win_nssm.ps1
+++ b/windows/win_nssm.ps1
@@ -352,7 +352,7 @@ Function Nssm-Update-Credentials
         }
         else {
             $fullUser = $user
-            If (-not($user -contains "@") -and ($user.Split("\").count -eq 1)) {
+            If (-Not($user.contains("@")) -And ($user.Split("\").count -eq 1)) {
                 $fullUser = ".\" + $user
             }