diff --git a/Tools/GacBuild.ps1 b/Tools/GacBuild.ps1
index 6c0a3e9e..e218c881 100644
--- a/Tools/GacBuild.ps1
+++ b/Tools/GacBuild.ps1
@@ -71,7 +71,7 @@ try {
         throw "Input does not exist: $FileName"
     }
     $FileName = (Resolve-Path -Path $FileName).Path
-    if (-not (Test-Path -Path "$($FileName).log")) {
+    if (Test-Path -Path "$($FileName).log") {
         Remove-Item -Path "$($FileName).log" -Recurse | Out-Null
     }
     New-Item -ItemType Directory "$($FileName).log" | Out-Null
diff --git a/Tools/GacClear.ps1 b/Tools/GacClear.ps1
index e6673ef5..f44f4555 100644
--- a/Tools/GacClear.ps1
+++ b/Tools/GacClear.ps1
@@ -20,7 +20,7 @@ try {
         throw "Input does not exist: $FileName"
     }
     $FileName = (Resolve-Path -Path $FileName).Path
-    if (-not (Test-Path -Path "$($FileName).log")) {
+    if (Test-Path -Path "$($FileName).log") {
         Remove-Item -Path "$($FileName).log" -Recurse | Out-Null
     }
     New-Item -ItemType Directory "$($FileName).log" | Out-Null