diff --git a/etc/mtree/BSD.include.dist b/etc/mtree/BSD.include.dist
index 21e3a1e1aaef..839184322d4f 100644
--- a/etc/mtree/BSD.include.dist
+++ b/etc/mtree/BSD.include.dist
@@ -79,6 +79,8 @@
     ..
     geom
     ..
+    gnu
+    ..
     isc
     ..
     isofs