diff --git a/admin/pretty-hostname/files/pretty_hostname.lua b/admin/pretty-hostname/files/pretty_hostname.lua
index 5c9c743..505a48d 100644
--- a/admin/pretty-hostname/files/pretty_hostname.lua
+++ b/admin/pretty-hostname/files/pretty_hostname.lua
@@ -36,6 +36,10 @@ function M.set(uci, pretty_hostname)
 		uci:set('system', system, 'pretty_hostname', pretty_hostname)
 	end
 
+	local kernel = assert(io.open('/proc/sys/kernel/hostname', 'w'))
+	kernel:write(hostname)
+	kernel:close()
+
 	uci:set('system', system, 'hostname', hostname)
 end