diff --git a/gnu/services/web.scm b/gnu/services/web.scm
index 3d149a105d..372f4dc6fc 100644
--- a/gnu/services/web.scm
+++ b/gnu/services/web.scm
@@ -742,8 +742,8 @@ (define nginx-service-type
                             (server-blocks
                               (append (nginx-configuration-server-blocks config)
                               servers)))))
-                (default-value
-                  (nginx-configuration))))
+                (default-value (nginx-configuration))
+                (description "Run the nginx Web server.")))
 
 (define-record-type* <fcgiwrap-configuration> fcgiwrap-configuration
   make-fcgiwrap-configuration