diff --git a/tail_posix.go b/tail_posix.go
index 3987b7e..56e31d9 100644
--- a/tail_posix.go
+++ b/tail_posix.go
@@ -1,4 +1,4 @@
-// +build linux darwin freebsd
+// +build linux darwin freebsd netbsd
 
 package tail