diff --git a/DESCRIPTION b/DESCRIPTION
index 1ecbd6d2bb..1da15e87dd 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: tern
 Title: Create Common TLGs Used in Clinical Trials
-Version: 0.9.5.9003
-Date: 2024-07-01
+Version: 0.9.5.9004
+Date: 2024-07-10
 Authors@R: c(
     person("Joe", "Zhu", , "joe.zhu@roche.com", role = c("aut", "cre")),
     person("Daniel", "Sabanés Bové", , "daniel.sabanes_bove@roche.com", role = "aut"),
diff --git a/NEWS.md b/NEWS.md
index f85ed6e9fc..54c4b65b60 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,9 +1,10 @@
-# tern 0.9.5.9003
+# tern 0.9.5.9004
 ### Enhancements
 * Added `errorbar_width` and `linetype` parameters to `g_lineplot`.
 
 ### Bug Fixes
 * Fixed a bug in `a_surv_time` that threw an error when split only has `"is_event"`.
+* Added defaults for `d_count_cumulative` parameters as described in the documentation.
 * Empty levels on `g_lineplot` x-axis are not shown in either plots.
 * Fixed disappearing line in `g_lineplot` when using only one group or strata level.
 
diff --git a/R/count_cumulative.R b/R/count_cumulative.R
index eb48c8c0d5..b1485847d6 100644
--- a/R/count_cumulative.R
+++ b/R/count_cumulative.R
@@ -86,7 +86,7 @@ h_count_cumulative <- function(x,
 #' @return Labels for [s_count_cumulative()].
 #'
 #' @export
-d_count_cumulative <- function(threshold, lower_tail, include_eq) {
+d_count_cumulative <- function(threshold, lower_tail = TRUE, include_eq = TRUE) {
   checkmate::assert_numeric(threshold)
   lg <- if (lower_tail) "<" else ">"
   eq <- if (include_eq) "=" else ""
diff --git a/man/d_count_cumulative.Rd b/man/d_count_cumulative.Rd
index 6be9db65be..98d272d21a 100644
--- a/man/d_count_cumulative.Rd
+++ b/man/d_count_cumulative.Rd
@@ -4,7 +4,7 @@
 \alias{d_count_cumulative}
 \title{Description of cumulative count}
 \usage{
-d_count_cumulative(threshold, lower_tail, include_eq)
+d_count_cumulative(threshold, lower_tail = TRUE, include_eq = TRUE)
 }
 \arguments{
 \item{threshold}{(\code{numeric(1)})\cr a cutoff value as threshold to count values of \code{x}.}