diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index c91d372a..337e92b2 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1268,6 +1268,7 @@ XML:
   - .kml
   - .mxml
   - .plist
+  - .pt
   - .rdf
   - .rss
   - .scxml
@@ -1288,6 +1289,7 @@ XML:
   - .xsd
   - .xsl
   - .xul
+  - .zcml
   filenames:
   - .classpath
   - .project