diff --git a/NAMESPACE b/NAMESPACE
index 92c25f8..43799ab 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -433,4 +433,5 @@ importFrom(stats,median)
 importFrom(stats,quantile)
 importFrom(utils,packageDescription)
 importFrom(utils,strOptions)
+importFrom(utils,tail)
 useDynLib(bit64, .registration = TRUE, .fixes = "C_")
diff --git a/R/bit64-package.R b/R/bit64-package.R
index b303afa..1767e41 100644
--- a/R/bit64-package.R
+++ b/R/bit64-package.R
@@ -697,7 +697,7 @@
 #' @importFrom graphics barplot par title
 #' @importFrom methods as is
 #' @importFrom stats cor median quantile
-#' @importFrom utils packageDescription strOptions
+#' @importFrom utils packageDescription strOptions tail
 #' @export -.integer64 : :.default :.integer64 !.integer64 !=.integer64
 #' @export [.integer64 [[.integer64 [[<-.integer64 [<-.integer64 *.integer64
 #' @export /.integer64 &.integer64 %/%.integer64 %%.integer64 %in% %in%.default