diff --git a/shadowsocks-libev.spec b/shadowsocks-libev.spec
index 31778ea..2863734 100644
--- a/shadowsocks-libev.spec
+++ b/shadowsocks-libev.spec
@@ -57,6 +57,7 @@ BuildRequires:  asciidoc
 BuildRequires:  systemd-rpm-macros
 BuildRequires:  xmlto
 BuildRequires:  pkgconfig(systemd)
+Requires(pre):  shadow
 Recommends:     shadowsocks-v2ray-plugin
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 %{?systemd_ordering}