diff --git a/R/top_levels.R b/R/top_levels.R
index 67e98d71..87320c11 100644
--- a/R/top_levels.R
+++ b/R/top_levels.R
@@ -5,7 +5,7 @@
 #'
 #' @param input_vec The factor variable to tabulate.
 #' @param n Number of levels to include in top and bottom groups
-#' @param show_na Should cases where the variable is NA be shown?
+#' @param show_na Should cases where the variable is `NA` be shown?
 #' @return A `data.frame` (actually a `tbl_df`) with the frequencies of the
 #'   grouped, tabulated variable.  Includes counts and percentages, and valid
 #'   percentages (calculated omitting `NA` values, if present in the vector and
diff --git a/man/top_levels.Rd b/man/top_levels.Rd
index 80d9571b..821c02c9 100644
--- a/man/top_levels.Rd
+++ b/man/top_levels.Rd
@@ -12,7 +12,7 @@ top_levels(input_vec, n = 2, show_na = FALSE)
 
 \item{n}{Number of levels to include in top and bottom groups}
 
-\item{show_na}{Should cases where the variable is NA be shown?}
+\item{show_na}{Should cases where the variable is \code{NA} be shown?}
 }
 \value{
 A \code{data.frame} (actually a \code{tbl_df}) with the frequencies of the