diff --git a/extensions/html/package.json b/extensions/html/package.json
index 3e685df1acf..6b1eac2d702 100644
--- a/extensions/html/package.json
+++ b/extensions/html/package.json
@@ -20,7 +20,7 @@
           ".htm",
           ".shtml",
           ".xhtml",
-          ".xhtm",
+          ".xht",
           ".mdoc",
           ".jsp",
           ".asp",