diff --git a/R/xlsx_cells.R b/R/xlsx_cells.R
index 6c514bb..13fb430 100644
--- a/R/xlsx_cells.R
+++ b/R/xlsx_cells.R
@@ -14,9 +14,13 @@
 #' xlsm) by looking at the file itself, rather than using the filename
 #' extension.
 #' @param include_blank_cells Logical. Whether to include cells that have no
-#' value or formula (but might have formatting or comments).  Useful when a
-#' whole column of cells has been formatted, but most are empty.  Try setting
-#' this to `FALSE` if a spreadsheet seems too large to load.
+#' value or formula (but might have formatting or comments). Useful when a
+#' whole column of cells has been formatted, but most are empty. Try setting
+#' this to `FALSE` if a spreadsheet seems too large to load. Cells that are not
+#' included in the Excel file because they do not contain a value, a formula, a
+#' comment or some formatting still won't be included even if
+#' `include_blank_cells` is set to `TRUE`. If rows for these cells are required
+#' in the output, `tidyr::complete` may be useful.
 #'
 #' @return
 #' A data frame with the following columns.
diff --git a/man/xlsx_cells.Rd b/man/xlsx_cells.Rd
index f6fd933..debd59c 100644
--- a/man/xlsx_cells.Rd
+++ b/man/xlsx_cells.Rd
@@ -23,9 +23,13 @@ xlsm) by looking at the file itself, rather than using the filename
 extension.}
 
 \item{include_blank_cells}{Logical. Whether to include cells that have no
-value or formula (but might have formatting or comments).  Useful when a
-whole column of cells has been formatted, but most are empty.  Try setting
-this to \code{FALSE} if a spreadsheet seems too large to load.}
+value or formula (but might have formatting or comments). Useful when a
+whole column of cells has been formatted, but most are empty. Try setting
+this to \code{FALSE} if a spreadsheet seems too large to load. Cells that are not
+included in the Excel file because they do not contain a value, a formula, a
+comment or some formatting still won't be included even if
+\code{include_blank_cells} is set to \code{TRUE}. If rows for these cells are required
+in the output, \code{tidyr::complete} may be useful.}
 }
 \value{
 A data frame with the following columns.