diff --git a/R/cuminc.R b/R/cuminc.R
index 7baf870..6f98f91 100644
--- a/R/cuminc.R
+++ b/R/cuminc.R
@@ -27,6 +27,9 @@
 #' indicating whether subjects with missing cause of failure should be removed
 #' or whether missing cause of failure should be treated as a separate cause of
 #' failure
+#' @param ... Allows extra arguments for future extensions, but for now just
+#' used for backwards compatibility (e.g. allowing use of defunct \code{failcodes}
+#' argument in reverse dependencies).
 #' 
 #' @return An object of class \code{"Cuminc"}, which is a data frame containing
 #' the estimated failure-free probabilities and cumulative incidences and their
@@ -80,7 +83,7 @@
 #' 
 #' @export 
 `Cuminc` <- function(time, status, data, group, 
-                     na.status=c("remove","extra"))
+                     na.status=c("remove","extra"), ...)
 {
   # Coerce data to data.frame as in msprep()
   if (!missing(data)) data <- as.data.frame(data)
diff --git a/man/Cuminc.Rd b/man/Cuminc.Rd
index cbac7fc..d25800d 100644
--- a/man/Cuminc.Rd
+++ b/man/Cuminc.Rd
@@ -6,7 +6,7 @@
 \title{Calculate nonparametric cumulative incidence functions and associated
 standard errors}
 \usage{
-Cuminc(time, status, data, group, na.status = c("remove", "extra"))
+Cuminc(time, status, data, group, na.status = c("remove", "extra"), ...)
 }
 \arguments{
 \item{time}{Either 1) a numeric vector containing the failure times or 2) a
@@ -27,6 +27,10 @@ level of \code{group}. If missing no groups are considered}
 indicating whether subjects with missing cause of failure should be removed
 or whether missing cause of failure should be treated as a separate cause of
 failure}
+
+\item{...}{Allows extra arguments for future extensions, but for now just
+used for backwards compatibility (e.g. allowing use of defunct \code{failcodes}
+argument in reverse dependencies).}
 }
 \value{
 An object of class \code{"Cuminc"}, which is a data frame containing