diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 93700c91..74989447 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1271,6 +1271,7 @@ XML:
 XProc:
   type: programming
   group: XML
+  lexer: XML
   primary_extension: .xpl
   extensions:
   - .xproc