diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 1fbc38b6..df3692e0 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1256,6 +1256,7 @@ XML:
   - .kml
   - .mxml
   - .plist
+  - .pt
   - .rdf
   - .rss
   - .svg
@@ -1269,6 +1270,7 @@ XML:
   - .xsd
   - .xsl
   - .xul
+  - .zcml
   filenames:
   - .classpath
   - .project