diff --git a/NAMESPACE b/NAMESPACE
index 69adf9b7..7f6afaf4 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -87,6 +87,7 @@ importFrom(stats,C)
 importFrom(stats,model.matrix)
 importFrom(stats,quantile)
 importFrom(stats,setNames)
+importFrom(stats,terms)
 importFrom(stringr,str_detect)
 importFrom(stringr,str_remove_all)
 importFrom(stringr,str_replace)
diff --git a/R/utilities.R b/R/utilities.R
index e2f70266..53b9fa10 100644
--- a/R/utilities.R
+++ b/R/utilities.R
@@ -32,6 +32,7 @@ add_attr = function(var, attribute, name) {
 #'
 #' @importFrom stringr str_subset
 #' @importFrom magrittr extract2
+#' @importFrom stats terms
 #'
 #' @return A character vector
 #'