diff --git a/ansi/tty_darwin.go b/ansi/tty_bsd.go
similarity index 59%
rename from ansi/tty_darwin.go
rename to ansi/tty_bsd.go
index 74d09ef4..75744d94 100644
--- a/ansi/tty_darwin.go
+++ b/ansi/tty_bsd.go
@@ -1,3 +1,4 @@
+// +build darwin freebsd openbsd netbsd dragonfly
 package ansi
 
 import "syscall"
diff --git a/codesearch/index/mmap_bsd.go b/codesearch/index/mmap_bsd.go
index 9442ab58..5e611b4f 100644
--- a/codesearch/index/mmap_bsd.go
+++ b/codesearch/index/mmap_bsd.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin freebsd openbsd netbsd
+// +build darwin freebsd openbsd netbsd dragonfly
 
 package index