diff --git a/NEWS.md b/NEWS.md
index b1add965a..695695f23 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -20,6 +20,8 @@
 
 * Column style `currency` is now correctly applied to numeric vectors. Previously it was not handled. This applies the built in spreadsheet style for currency presumably linked to the spreadsheet software locale. [879](https://github.com/JanMarvin/openxlsx2/pull/879)
 
+* `wb_to_df(col_names = FALSE)` no longer drops column names from logical vectors. Previously, column names were replaced by `NA`. Now the column name is returned as a cell value in a character column. [884](https://github.com/JanMarvin/openxlsx2/pull/884)
+
 
 ***************************************************************************
 
diff --git a/R/wb_functions.R b/R/wb_functions.R
index ac075a821..c28ba9eb1 100644
--- a/R/wb_functions.R
+++ b/R/wb_functions.R
@@ -106,7 +106,7 @@ guess_col_type <- function(tt) {
   types[names(col_dte[col_dte])] <- 3
 
   # there are bools as well
-  col_log <- vapply(tt[!col_num], function(x) any(x == "b", na.rm = TRUE), NA)
+  col_log <- vapply(tt[!col_num], function(x) all(x == "b", na.rm = TRUE), NA)
   types[names(col_log[col_log])] <- 4
 
   # or even hms
diff --git a/src/helper_functions.cpp b/src/helper_functions.cpp
index e4723b330..3be586ef1 100644
--- a/src/helper_functions.cpp
+++ b/src/helper_functions.cpp
@@ -318,7 +318,7 @@ bool is_double(std::string x) {
 // [[Rcpp::export]]
 Rcpp::LogicalVector is_charnum(Rcpp::CharacterVector x) {
   Rcpp::LogicalVector out(x.size());
-  for (size_t i = 0; i < x.size(); ++i) {
+  for (R_xlen_t i = 0; i < x.size(); ++i) {
     out[i] = is_double(Rcpp::as<std::string>(x[i]));
   }
   return out;
diff --git a/tests/testthat/test-read_from_created_wb.R b/tests/testthat/test-read_from_created_wb.R
index 085303956..66a027b9f 100644
--- a/tests/testthat/test-read_from_created_wb.R
+++ b/tests/testthat/test-read_from_created_wb.R
@@ -187,3 +187,17 @@ test_that("wb_load contains path", {
   expect_equal(exp, got)
 
 })
+
+test_that("column names are not missing with col_names = FALSE", {
+  dat <- data.frame(
+    numeric = 1:2,
+    character = c("a", "b"),
+    logical = c(TRUE, FALSE)
+  )
+
+  wb <- wb_workbook()$add_worksheet()$add_data(x = dat)
+  got <- as.character(wb_to_df(wb, col_names = FALSE)[2, ])
+  exp <- c("1", "a", "TRUE")
+  expect_equal(exp, got)
+
+})
diff --git a/tests/testthat/test-write.R b/tests/testthat/test-write.R
index 859b8a665..ba9adaa07 100644
--- a/tests/testthat/test-write.R
+++ b/tests/testthat/test-write.R
@@ -192,7 +192,7 @@ test_that("update cell(s)", {
 
   exp <- structure(
     list(c(7, NA, NA, NA, NA, 7),
-         c(NA, NA, TRUE, FALSE, TRUE, NA),
+         c("y", "z", "TRUE", "FALSE", "TRUE", NA),
          c(2, NA, 2.5, NA, NA, NA),
          c(7, 2, 3, NA, 5, NA)),
     names = c(NA, "x", "Var2", "Var3"),