diff --git a/R/collapse_rows.R b/R/collapse_rows.R
index b26ed5f..d45fe22 100644
--- a/R/collapse_rows.R
+++ b/R/collapse_rows.R
@@ -252,6 +252,7 @@
 
   out <- structure(out, format = "latex", class = "knitr_kable")
   table_info$collapse_rows <- TRUE
+  table_info$collapse_matrix <- collapse_matrix
   attr(out, "kable_meta") <- table_info
   if(row_group_label_position == 'stack'){
     group_row_index_list <- collapse_rows_index(kable_dt, head(columns, -1))
diff --git a/R/group_rows.R b/R/group_rows.R
index 09fad01..5c3543b 100644
--- a/R/group_rows.R
+++ b/R/group_rows.R
@@ -35,7 +35,7 @@
 #' @param hline_after A replicate of `hline.after` in xtable. It
 #' addes a hline after the row
 #' @param extra_latex_after Extra LaTeX text to be added after the row.
-#' @param indent A T?F value to control whether list items are indented.
+#' @param indent A T/F value to control whether list items are indented.
 #'
 #' @examples x <- knitr::kable(head(mtcars), "html")
 #' # Put Row 2 to Row 5 into a Group and label it as "Group A"