diff --git a/pkgs/applications/networking/mailreaders/notmuch/muchsync.nix b/pkgs/applications/networking/mailreaders/notmuch/muchsync.nix
index 17d66ba6043..c008c478d22 100644
--- a/pkgs/applications/networking/mailreaders/notmuch/muchsync.nix
+++ b/pkgs/applications/networking/mailreaders/notmuch/muchsync.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl
-, notmuch, openssl, pkgconfig, sqlite, xapian
+, notmuch, openssl, pkgconfig, sqlite, xapian, zlib
 }:
 stdenv.mkDerivation rec {
   version = "2";
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     url = "http://www.muchsync.org/src/${name}.tar.gz";
     sha256 = "1dqp23a043kkzl0g2f4j3m7r7lg303gz7a0fsj0dm5ag3kpvp5f1";
   };
-  buildInputs = [ notmuch openssl pkgconfig sqlite xapian ];
+  buildInputs = [ notmuch openssl pkgconfig sqlite xapian zlib ];
   meta = {
     description = "Synchronize maildirs and notmuch databases";
     platforms = stdenv.lib.platforms.unix;