diff --git a/build/_verify-authenticode.shade b/build/_verify-authenticode.shade
index fee1c48460..97539ca91e 100644
--- a/build/_verify-authenticode.shade
+++ b/build/_verify-authenticode.shade
@@ -7,7 +7,7 @@ default expectedHash = ''
 @{
     Log.Info(string.Format("Verifying Authenticode signature of {0}", verifyFilePath));
 
-    var signToolExePaths = new [] { "C:\Program Files (x86)\Windows Kits\8.1\bin\x86\signtool.exe", "C:\Program Files\Windows Kits\8.1\bin\x86\signtool.exe" };
+    var signToolExePaths = new [] { "C:\\Program Files (x86)\\Windows Kits\\8.1\\bin\\x86\\signtool.exe", "C:\\Program Files\\Windows Kits\\8.1\\bin\\x86\\signtool.exe" };
     var signToolExe = signToolExePaths.FirstOrDefault(File.Exists);
 
     if (string.IsNullOrEmpty(signToolExe))