diff --git a/src/Tools/thumbs/ThumbnailProvider/Main.cpp b/src/Tools/thumbs/ThumbnailProvider/Main.cpp
index 8b61c2721a..7aacc17622 100644
--- a/src/Tools/thumbs/ThumbnailProvider/Main.cpp
+++ b/src/Tools/thumbs/ThumbnailProvider/Main.cpp
@@ -107,7 +107,8 @@ STDAPI DllRegisterServer()
                                         {HKEY_CLASSES_ROOT, L"CLSID\\" szCLSID_SampleThumbnailProvider L"\\InprocServer32", NULL, REG_SZ, (DWORD_PTR)szModule},
                                         {HKEY_CLASSES_ROOT, L"CLSID\\" szCLSID_SampleThumbnailProvider L"\\InprocServer32", L"ThreadingModel", REG_SZ, (DWORD_PTR)L"Apartment"},
                                       //{HKEY_CLASSES_ROOT, L".FCStd\\shellex", L"Trick only here to create shellex when not existing",REG_DWORD, 1}, 
-                                        {HKEY_CLASSES_ROOT, L".FCStd\\shellex\\{E357FCCD-A995-4576-B01F-234630154E96}", NULL, REG_SZ, (DWORD_PTR)szCLSID_SampleThumbnailProvider}
+                                        {HKEY_CLASSES_ROOT, L".FCStd\\shellex\\{E357FCCD-A995-4576-B01F-234630154E96}", NULL, REG_SZ, (DWORD_PTR)szCLSID_SampleThumbnailProvider},
+                                        {HKEY_CLASSES_ROOT, L".FCBak\\shellex\\{E357FCCD-A995-4576-B01F-234630154E96}", NULL, REG_SZ, (DWORD_PTR)szCLSID_SampleThumbnailProvider}
                                      };
 
     return CreateRegistryKeys(keys, ARRAYSIZE(keys));