diff --git a/R/mfairUtils.R b/R/mfairUtils.R
index e423817..2e44c61 100644
--- a/R/mfairUtils.R
+++ b/R/mfairUtils.R
@@ -1 +1,4 @@
+#'Defined the matrixORdgCMatrix class as the union of matrix and Matrix::dgCMatrix
+#' @importFrom Matrix dgCMatrix
+#'
 setClassUnion(name = "matrixORdgCMatrix", members = c("matrix", "dgCMatrix"))