diff --git a/src/internal/poll/fd_fsync_posix.go b/src/internal/poll/fd_fsync_posix.go
index 943f59a9ab6..30dde0720b2 100644
--- a/src/internal/poll/fd_fsync_posix.go
+++ b/src/internal/poll/fd_fsync_posix.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 dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows
+// +build aix dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows
 
 package poll