diff --git a/common/resources.tf b/common/resources.tf
index a972918..8404a4c 100644
--- a/common/resources.tf
+++ b/common/resources.tf
@@ -29,7 +29,7 @@ locals {
   # strip spaces, convert to lowercase, make distinct, sort. Remove those not in the _defaults
   add_safeguard_tags      = local.enable_title26 ? ["title26"] : []
   _default_safeguard_tags = { for d in local._defaults["data_safeguards"] : d => d }
-  safeguard_tags          = sort(compact(concat([for t in var.data_safeguards : lookup(local._default_safeguard_tags, lower(replace(t, " ", "")), "")], local.add_safeguard_tags)))
+  safeguard_tags          = sort(distinct(compact(concat([for t in var.data_safeguards : lookup(local._default_safeguard_tags, lower(replace(t, " ", "")), "")], local.add_safeguard_tags))))
   add_tags = {
     safeguard = {
       "exists"     = { "boc:safeguard" = join(",", local.safeguard_tags) }