diff --git a/lib/binds.lua b/lib/binds.lua
index 395c44cbc..20b20bd20 100644
--- a/lib/binds.lua
+++ b/lib/binds.lua
@@ -23,7 +23,7 @@ local modes = require("modes")
 local join, split = lousy.util.table.join, lousy.util.string.split
 
 -- URI aliases
-local is_uri, split_uri = lousy.uri.is_uri, lousy.uri.split
+local split_uri = lousy.uri.split
 
 --- Compatibility wrapper for @ref{modes/add_binds|modes.add_binds()}.
 -- @deprecated use @ref{modes/add_binds|modes.add_binds()} instead.
@@ -482,7 +482,7 @@ modes.add_cmds({
         format = "{uri}",
     }},
     { ":w[inopen]", "Open one or more URLs in a new window.", {
-        func = function (w, o) window.new({o.arg}) end,
+        func = function (_, o) window.new({o.arg}) end,
         format = "{uri}",
     }},
     { ":javascript, :js", "Evaluate JavaScript snippet.",
diff --git a/lib/error_page.lua b/lib/error_page.lua
index 7f01e51e4..d1a48fa63 100644
--- a/lib/error_page.lua
+++ b/lib/error_page.lua
@@ -17,6 +17,9 @@ local _M = {}
 
 local error_page_wm = require_web_module("error_page_wm")
 
+--- Path to the whitelist of allowed invalid certificates.
+-- @type string
+-- @readwrite
 _M.cert_db_path = luakit.data_dir .. "/allowed_certificates.db"
 
 --- Connect to and initialize the bookmarks database.