diff --git a/R/get_planes.R b/R/get_planes.R
index c7f4ff0..8dd2f07 100644
--- a/R/get_planes.R
+++ b/R/get_planes.R
@@ -9,6 +9,8 @@
 #' @inheritParams anyflights 
 #' 
 #' @inheritParams get_airlines
+#'
+#' @param year The argument will be ignored and is present only for backward-compatibility
 #' 
 #' @return A data frame with ~3500 rows and 9 variables:
 #' \describe{
@@ -44,7 +46,7 @@
 #' to a data-only package.
 #'
 #' @export
-get_planes <- function(year, dir = NULL, flights_data = NULL) {
+get_planes <- function(year = NULL, dir = NULL, flights_data = NULL) {
 
   # check user inputs
   check_arguments(year = year,