diff --git a/gnu/usr.bin/man/manpath/manpath.config b/gnu/usr.bin/man/manpath/manpath.config
index 30e672cb1d38..d907ebdadb3b 100644
--- a/gnu/usr.bin/man/manpath/manpath.config
+++ b/gnu/usr.bin/man/manpath/manpath.config
@@ -18,6 +18,7 @@ MANDATORY_MANPATH	/usr/share/openssl/man
 #
 OPTIONAL_MANPATH	/usr/local/man
 OPTIONAL_MANPATH	/usr/local/lib/perl5/5.6.1/man
+OPTIONAL_MANPATH	/usr/X11R6/man
 #
 # set up PATH to MANPATH mapping
 #