diff --git a/luci-app-https-dns-proxy/luasrc/model/cbi/https-dns-proxy.lua b/luci-app-https-dns-proxy/luasrc/model/cbi/https-dns-proxy.lua
index d914bf09a..d4fee9e00 100644
--- a/luci-app-https-dns-proxy/luasrc/model/cbi/https-dns-proxy.lua
+++ b/luci-app-https-dns-proxy/luasrc/model/cbi/https-dns-proxy.lua
@@ -36,14 +36,16 @@ function create_helper_text()
 end
 
 function get_provider_name(value)
-	for filename in fs.dir(providers_dir) do
-		local p_func = loadfile(providers_dir .. filename)
-		setfenv(p_func, { _ = i18n.translate })
-		local p = p_func()
-		value = value:gsub('[%p%c%s]', '')
-		p.url_match = p.resolver_url:gsub('[%p%c%s]', '')
-		if value:match(p.url_match) then
-			return p.label
+	if value ~= nil then
+		for filename in fs.dir(providers_dir) do
+			local p_func = loadfile(providers_dir .. filename)
+			setfenv(p_func, { _ = i18n.translate })
+			local p = p_func()
+			value = value:gsub('[%p%c%s]', '')
+			p.url_match = p.resolver_url:gsub('[%p%c%s]', '')
+			if value:match(p.url_match) then
+				return p.label
+			end
 		end
 	end
 	return translate("Unknown Provider")