diff --git a/extensions/cpp/package.json b/extensions/cpp/package.json
index 0e12733535f..be5c8902ce5 100644
--- a/extensions/cpp/package.json
+++ b/extensions/cpp/package.json
@@ -42,6 +42,8 @@
           ".inl",
           ".ipp",
           ".ixx",
+          ".tpp",
+          ".txx",
           ".hpp.in",
           ".h.in"
         ],