diff --git a/R/simulate.R b/R/simulate.R
index cd154a4a..6ff25d88 100644
--- a/R/simulate.R
+++ b/R/simulate.R
@@ -162,7 +162,10 @@ get_rcrd_values <- function(rname, prov, aggfn, .data, y, censor) {
                                    get_record_type(vrcrds, rname),
                                    class(y))
   # TODO: this is a problem when we have nested_labels
-  vals <- aggregate_values(y, .data[[uname]], agg_fn)
+  if(is_null(attr(.data[[uname]], "non-nested")))
+    vals <- .data[[uname]]
+  else vals <- attr(.data[[uname]], "non-nested")
+  vals <- aggregate_values(y, vals, agg_fn)
   if(rname %in% names(vrcrds)) {
     if(is.list(censor) && rname %in% names(censor)) {
       get_censored_value(vals, vrcrds[[rname]], censor[[rname]])