diff --git a/R/data.R b/R/data.R
index 01523cf..46f5904 100644
--- a/R/data.R
+++ b/R/data.R
@@ -43,4 +43,4 @@
 #' \item{map}{A list describing the genetic map}
 #' ...
 #' }
-"m4_cross"
+"m8_cross"
diff --git a/man/m4_cross.Rd b/man/m4_cross.Rd
index ad7fc32..200475b 100644
--- a/man/m4_cross.Rd
+++ b/man/m4_cross.Rd
@@ -3,7 +3,6 @@
 \docType{data}
 \name{m4_cross}
 \alias{m4_cross}
-\alias{m4_cross}
 \title{A multiparental cross object}
 \format{A list of class 'mpcross'
 \describe{
@@ -12,13 +11,9 @@
 ...
 }}
 \usage{
-m4_cross
-
 m4_cross
 }
 \description{
 A 4-way mpcross object produced by mpMap
-
-An 8-way mpcross object produced by mpMap
 }
 \keyword{datasets}
diff --git a/man/m8_cross.Rd b/man/m8_cross.Rd
new file mode 100644
index 0000000..bffbab7
--- /dev/null
+++ b/man/m8_cross.Rd
@@ -0,0 +1,19 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/data.R
+\docType{data}
+\name{m8_cross}
+\alias{m8_cross}
+\title{A multiparental cross object}
+\format{A list of class 'mpcross'
+\describe{
+\item{founders}{The genotyping of the founders}
+\item{map}{A list describing the genetic map}
+...
+}}
+\usage{
+m8_cross
+}
+\description{
+An 8-way mpcross object produced by mpMap
+}
+\keyword{datasets}