diff --git a/R/as_tibble.R b/R/as_tibble.R
index ad0e7a95a..877fe81ae 100644
--- a/R/as_tibble.R
+++ b/R/as_tibble.R
@@ -245,7 +245,6 @@ as_tibble.table <- function(x, `_n` = "n", ..., n = `_n`, .name_repair = "check_
 
 #' @export
 #' @rdname as_tibble
-#' @usage \method{as_tibble}{NULL}(x, ...)
 as_tibble.NULL <- function(x, ...) {
   if (missing(x)) {
     deprecate_stop("3.0.0", "as_tibble(x = 'can\\'t be missing')")
diff --git a/man/as_tibble.Rd b/man/as_tibble.Rd
index 47cb94252..4397e3d6b 100644
--- a/man/as_tibble.Rd
+++ b/man/as_tibble.Rd
@@ -41,7 +41,7 @@ as_tibble(
 
 \method{as_tibble}{table}(x, `_n` = "n", ..., n = `_n`, .name_repair = "check_unique")
 
-\method{as_tibble}{NULL}(x, ...)
+\method{as_tibble}{`NULL`}(x, ...)
 
 \method{as_tibble}{default}(x, ...)