diff --git a/release.ps1 b/release.ps1
index f81bbfb..ff48aab 100644
--- a/release.ps1
+++ b/release.ps1
@@ -184,8 +184,8 @@ try {
   $nextTag = Get-NextTag -TagPrefix $Prefix
   Write-Host "Next tag: $nextTag" -ForegroundColor Green
 
-  $existing = Get-GitOutput "tag --list `"$nextTag`""
-  if ($existing.Count -gt 0) {
+  $existing = @(Get-GitOutput "tag --list `"$nextTag`"")
+  if ($existing.Length -gt 0) {
     throw "Tag already exists: $nextTag"
   }