diff --git a/debian/shadowsocks-libev-local@.service b/debian/shadowsocks-libev-local@.service
index ae06913a..3595f6c8 100644
--- a/debian/shadowsocks-libev-local@.service
+++ b/debian/shadowsocks-libev-local@.service
@@ -11,6 +11,7 @@
 
 [Unit]
 Description=Shadowsocks-Libev Custom Client Service for %I
+Documentation=man:ss-local(1)
 After=network.target
 
 [Service]
diff --git a/debian/shadowsocks-libev-redir@.service b/debian/shadowsocks-libev-redir@.service
index 60ea2294..420f1946 100644
--- a/debian/shadowsocks-libev-redir@.service
+++ b/debian/shadowsocks-libev-redir@.service
@@ -11,6 +11,7 @@
 
 [Unit]
 Description=Shadowsocks-Libev Custom Client Service Redir Mode for %I
+Documentation=man:ss-redir(1)
 After=network.target
 
 [Service]
diff --git a/debian/shadowsocks-libev-server@.service b/debian/shadowsocks-libev-server@.service
index 9752bde3..b6469951 100644
--- a/debian/shadowsocks-libev-server@.service
+++ b/debian/shadowsocks-libev-server@.service
@@ -11,6 +11,7 @@
 
 [Unit]
 Description=Shadowsocks-Libev Custom Server Service for %I
+Documentation=man:ss-server(1)
 After=network.target
 
 [Service]
diff --git a/debian/shadowsocks-libev-tunnel@.service b/debian/shadowsocks-libev-tunnel@.service
index 7331551a..3f9f8aef 100644
--- a/debian/shadowsocks-libev-tunnel@.service
+++ b/debian/shadowsocks-libev-tunnel@.service
@@ -11,6 +11,7 @@
 
 [Unit]
 Description=Shadowsocks-Libev Custom Client Service Tunnel Mode for %I
+Documentation=man:ss-tunnel(1)
 After=network.target
 
 [Service]
diff --git a/debian/shadowsocks-libev.service b/debian/shadowsocks-libev.service
index 4daef94c..4887b593 100644
--- a/debian/shadowsocks-libev.service
+++ b/debian/shadowsocks-libev.service
@@ -10,6 +10,7 @@
 
 [Unit]
 Description=Shadowsocks-libev Default Server Service
+Documentation=man:shadowsocks-libev(8)
 After=network.target
 
 [Service]