diff --git a/scripts/utils.ps1 b/scripts/utils.ps1
index ab7fec5..c5a62cd 100644
--- a/scripts/utils.ps1
+++ b/scripts/utils.ps1
@@ -65,7 +65,7 @@ function Digest-Hash($path) {
 function Get-VersionStr() {
 
     # Clear existing variable
-    Clear-Variable -name string
+    if ($string) { Clear-Variable -name string }
 
     # Determine if git is available
     if (Get-Command "git.exe" -ErrorAction SilentlyContinue)