diff --git a/NAMESPACE b/NAMESPACE
index a3c488d..833c8bc 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -34,6 +34,7 @@ export(generate_start_tab)
 export(get_DOBs)
 export(get_antibody_level_predictions)
 export(get_best_pars)
+export(get_demographic_groups)
 export(get_index_pars)
 export(get_n_alive)
 export(get_n_alive_group)
diff --git a/R/helpers.R b/R/helpers.R
index 4661ccd..f9f5534 100644
--- a/R/helpers.R
+++ b/R/helpers.R
@@ -512,6 +512,7 @@ setup_antibody_data_for_posterior_func <- function(
   ))
 }
 
+#' @export
 get_demographic_groups <- function(par_tab, antibody_data, demographics,demographic_groups=NULL){
   ## Setup data vectors and extract
   if(!is.null(demographics)){