diff --git a/R/acctran.R b/R/acctran.R
index 1a6668f7..fbb216ce 100644
--- a/R/acctran.R
+++ b/R/acctran.R
@@ -36,6 +36,7 @@ acctran2 <- function(tree, data) {
 #' @author Klaus Schliep \email{klaus.schliep@@gmail.com}
 #' @seealso \code{\link{pratchet}}
 #' @examples
+#' data(Laurasiatherian)
 #' # lower number of iterations for the example, to run time less than 5 sec.
 #' treeRatchet <- pratchet(Laurasiatherian, minit=5, k=5, trace=0)
 #' # assign edge length (number of substitutions)
diff --git a/man/acctran.Rd b/man/acctran.Rd
index 7b17f8ad..8b91bd07 100644
--- a/man/acctran.Rd
+++ b/man/acctran.Rd
@@ -26,6 +26,7 @@ algorithm. Ties are broken at random and trees can be multifurating.
 need to be bifurcating and ties are split.
 }
 \examples{
+data(Laurasiatherian)
 # lower number of iterations for the example, to run time less than 5 sec.
 treeRatchet <- pratchet(Laurasiatherian, minit=5, k=5, trace=0)
 # assign edge length (number of substitutions)