diff --git a/luci-app-passwall/root/usr/share/passwall/helper_chinadns_add.lua b/luci-app-passwall/root/usr/share/passwall/helper_chinadns_add.lua
index 061615370..93384b0ed 100644
--- a/luci-app-passwall/root/usr/share/passwall/helper_chinadns_add.lua
+++ b/luci-app-passwall/root/usr/share/passwall/helper_chinadns_add.lua
@@ -158,11 +158,13 @@ end
 local file_vpslist = TMP_ACL_PATH .. "/vpslist"
 if not is_file_nonzero(file_vpslist) then
 	local f_out = io.open(file_vpslist, "w")
+	local written_domains = {}
 	uci:foreach(appname, "nodes", function(t)
 		local function process_address(address)
 			if address == "engage.cloudflareclient.com" then return end
-			if datatypes.hostname(address) then
+			if datatypes.hostname(address) and not written_domains[address] then
 				f_out:write(address .. "\n")
+				written_domains[address] = true
 			end
 		end
 		process_address(t.address)
diff --git a/luci-app-passwall/root/usr/share/passwall/helper_smartdns_add.lua b/luci-app-passwall/root/usr/share/passwall/helper_smartdns_add.lua
index bd06c07c9..4c5f50d00 100644
--- a/luci-app-passwall/root/usr/share/passwall/helper_smartdns_add.lua
+++ b/luci-app-passwall/root/usr/share/passwall/helper_smartdns_add.lua
@@ -274,11 +274,13 @@ end
 local file_vpslist = TMP_ACL_PATH .. "/vpslist"
 if not is_file_nonzero(file_vpslist) then
 	local f_out = io.open(file_vpslist, "w")
+	local written_domains = {}
 	uci:foreach(appname, "nodes", function(t)
 		local function process_address(address)
 			if address == "engage.cloudflareclient.com" then return end
-			if datatypes.hostname(address) then
+			if datatypes.hostname(address) and not written_domains[address] then
 				f_out:write(address .. "\n")
+				written_domains[address] = true
 			end
 		end
 		process_address(t.address)