diff --git a/DESCRIPTION b/DESCRIPTION
index 3f34454b36..d97ce7e689 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -78,7 +78,7 @@ Config/testthat/edition: 3
 Encoding: UTF-8
 LazyData: true
 Roxygen: list(markdown = TRUE)
-RoxygenNote: 7.3.1
+RoxygenNote: 7.3.2
 Collate: 
     'ggproto.R'
     'ggplot-global.R'
diff --git a/R/labeller.R b/R/labeller.R
index 442f05d496..3dbb9b63ac 100644
--- a/R/labeller.R
+++ b/R/labeller.R
@@ -83,6 +83,9 @@
 #' # Interpreting the labels as plotmath expressions
 #' p + facet_grid(. ~ cyl2)
 #' p + facet_grid(. ~ cyl2, labeller = label_parsed)
+#'
+#' # Include optional argument in label function
+#' p + facet_grid(. ~ cyl, labeller = function(x) label_both(x, sep = "="))
 #' }
 #' @name labellers
 NULL
diff --git a/man/labellers.Rd b/man/labellers.Rd
index 63a4980eb7..09f160bf40 100644
--- a/man/labellers.Rd
+++ b/man/labellers.Rd
@@ -108,6 +108,9 @@ p + facet_grid(am ~ vs+cyl, labeller = label_context)
 # Interpreting the labels as plotmath expressions
 p + facet_grid(. ~ cyl2)
 p + facet_grid(. ~ cyl2, labeller = label_parsed)
+
+# Include optional argument in label function
+p + facet_grid(. ~ cyl, labeller = function(x) label_both(x, sep = "="))
 }
 }
 \seealso{