diff --git a/R/rescale_weights.R b/R/rescale_weights.R
index 162863609..12b839cc2 100644
--- a/R/rescale_weights.R
+++ b/R/rescale_weights.R
@@ -97,7 +97,11 @@
 #'   )
 #' }
 #' @export
-rescale_weights <- function(data, by, probability_weights, nest = FALSE, method = "carle") {
+rescale_weights <- function(data,
+                            by = NULL,
+                            probability_weights = NULL,
+                            nest = FALSE,
+                            method = "carle") {
   if (inherits(by, "formula")) {
     by <- all.vars(by)
   }
diff --git a/man/rescale_weights.Rd b/man/rescale_weights.Rd
index 90e0727eb..30f62fe6c 100644
--- a/man/rescale_weights.Rd
+++ b/man/rescale_weights.Rd
@@ -4,7 +4,13 @@
 \alias{rescale_weights}
 \title{Rescale design weights for multilevel analysis}
 \usage{
-rescale_weights(data, by, probability_weights, nest = FALSE, method = "carle")
+rescale_weights(
+  data,
+  by = NULL,
+  probability_weights = NULL,
+  nest = FALSE,
+  method = "carle"
+)
 }
 \arguments{
 \item{data}{A data frame.}