diff --git a/Source/CPack/WiX/cmCPackWIXGenerator.cxx b/Source/CPack/WiX/cmCPackWIXGenerator.cxx
index 6f1daaa0e..f892cf9c1 100644
--- a/Source/CPack/WiX/cmCPackWIXGenerator.cxx
+++ b/Source/CPack/WiX/cmCPackWIXGenerator.cxx
@@ -765,7 +765,7 @@ bool cmCPackWIXGenerator::CreateStartMenuShortcuts(
   fileDefinitions.EndElement("RemoveFolder");
 
   std::string registryKey =
-    std::string("Software/") + cpackVendor + "/" + cpackPackageName;
+    std::string("Software\\") + cpackVendor + "\\" + cpackPackageName;
 
   fileDefinitions.BeginElement("RegistryValue");
   fileDefinitions.AddAttribute("Root", "HKCU");