diff --git a/runtime/syntax/gentoo-etc-portage.yaml b/runtime/syntax/gentoo-etc-portage.yaml
index 850ffbdc..300687e6 100644
--- a/runtime/syntax/gentoo-etc-portage.yaml
+++ b/runtime/syntax/gentoo-etc-portage.yaml
@@ -1,7 +1,7 @@
 filetype: etc-portage
 
 detect:
-    filename: "\\.(keywords|mask|unmask|use)$"
+    filename: "\\.(keywords|mask|unmask|use)(/.+)?$"
 
 rules:
     # Use flags: