diff --git a/Source/cmGlobalVisualStudioGenerator.cxx b/Source/cmGlobalVisualStudioGenerator.cxx
index 141b5ebf26..57ced0fffd 100644
--- a/Source/cmGlobalVisualStudioGenerator.cxx
+++ b/Source/cmGlobalVisualStudioGenerator.cxx
@@ -630,7 +630,8 @@ bool IsVisualStudioMacrosFileRegistered(const std::string& macrosFile,
 
         RegCloseKey(hsubkey);
       } else {
-        std::cout << "error opening subkey: " << subkeyname << std::endl;
+        std::cout << "error opening subkey: "
+                  << cmsys::Encoding::ToNarrow(subkeyname) << std::endl;
         std::cout << std::endl;
       }