diff --git a/common/common.tf b/common/common.tf
index 238c469..6c1cc84 100644
--- a/common/common.tf
+++ b/common/common.tf
@@ -17,7 +17,7 @@ locals {
   rr_type                 = upper(local.record_type)
   default_enable_ptr      = lookup(local._defaults.enable_ptr, local.record_type, false)
   default_heritage_prefix = lookup(local._defaults.heritage_prefix, local.record_type, "") != "" ? format("%v.", lookup(local._defaults.heritage_prefix, local.record_type)) : ""
-  values                  = type(var.values) == "string" ? [var.values] : var.values
+  values                  = try([tostring(var.values)], tolist(var.values))
 }
 
 resource "time_static" "timestamp" {}