diff --git a/scripts/compute-virtuals.ps1 b/scripts/compute-virtuals.ps1
index d677916..fc531e6 100644
--- a/scripts/compute-virtuals.ps1
+++ b/scripts/compute-virtuals.ps1
@@ -38,7 +38,7 @@ foreach ($ts in (Get-ChildItem $dir)) {
         $toolsets."vc14" = $ts
     } elseif ((14 -eq $tsv[0]) -and (19 -ge $tsv[1])) {
         $toolsets."vc15" = $ts
-    } elseif (14 -eq $tsv[0]) -and (39 -ge $tsv[1])) {
+    } elseif ((14 -eq $tsv[0]) -and (39 -ge $tsv[1])) {
         $toolsets."vs16" = $ts
     } elseif (14 -eq $tsv[0]) {
         $toolsets."vs17" = $ts