diff --git a/_tags b/_tags
index 26fe009..8b1a4c8 100644
--- a/_tags
+++ b/_tags
@@ -6,7 +6,7 @@ true : package(rresult logs ipaddr x509 tls bos hex ptime ptime.clock.os astring
 <src/vmm_compress.ml>: package(decompress)
 <src/vmm_wire.{ml,mli}>: package(ppx_cstruct)
 <src/vmm_asn.{ml,mli}>: package(asn1-combinators)
-<src/vmm_lwt.{ml,mli}>: package(lwt)
+<src/vmm_lwt.{ml,mli}>: package(lwt lwt.unix)
 <src/vmm_tls.{ml,mli}>: package(lwt tls.lwt)
 
 <app/*>: package(lwt.unix cmdliner logs.fmt fmt.cli logs.cli fmt.tty lwt ipaddr.unix decompress)