diff --git a/eng/scripts/Language-Settings.ps1 b/eng/scripts/Language-Settings.ps1
index c8520f9b6cab..2042223a73c3 100644
--- a/eng/scripts/Language-Settings.ps1
+++ b/eng/scripts/Language-Settings.ps1
@@ -49,7 +49,7 @@ function Get-python-AdditionalValidationPackagesFromPackageSet {
 
     # handle any changes under sdk/<file>.<extension>
     if ($pathComponents.Length -eq 2 -and $pathComponents[0] -eq "sdk") {
-      changedServices += "template"
+      $changedServices += "template"
     }
   }
   foreach ($changedService in $changedServices) {