diff --git a/src/xlsb/mod.rs b/src/xlsb/mod.rs
index 3de08a4..364bf6e 100644
--- a/src/xlsb/mod.rs
+++ b/src/xlsb/mod.rs
@@ -581,7 +581,7 @@ impl<RS: Read + Seek> ReaderRef<RS> for Xlsb<RS> {
                 // an empty cell at the beginning with row `header_row` and same column as the first non-empty cell.
                 if cells.first().map_or(false, |c| c.pos.0 != header_row_idx) {
                     cells.insert(
-                        header_row_idx as usize,
+                        0,
                         Cell {
                             pos: (
                                 header_row_idx,
diff --git a/src/xlsx/mod.rs b/src/xlsx/mod.rs
index 6fc81e4..78d74dd 100644
--- a/src/xlsx/mod.rs
+++ b/src/xlsx/mod.rs
@@ -1060,7 +1060,7 @@ impl<RS: Read + Seek> ReaderRef<RS> for Xlsx<RS> {
                 // an empty cell at the beginning with row `header_row` and same column as the first non-empty cell.
                 if cells.first().map_or(false, |c| c.pos.0 != header_row_idx) {
                     cells.insert(
-                        header_row_idx as usize,
+                        0,
                         Cell {
                             pos: (
                                 header_row_idx,
diff --git a/tests/no-header.xlsx b/tests/no-header.xlsx
new file mode 100644
index 0000000..1d938f8
Binary files /dev/null and b/tests/no-header.xlsx differ
diff --git a/tests/test.rs b/tests/test.rs
index 97d0da7..b74d89e 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -2099,3 +2099,29 @@ fn ods_with_annotations() {
     let range = ods.worksheet_range("table1").unwrap();
     range_eq!(range, [[String("cell a.1".to_string())],]);
 }
+
+#[rstest]
+#[case(HeaderRow::Row(0), &[
+    [Empty, Empty],
+    [Empty, Empty],
+    [String("a".to_string()), Float(0.0)],
+    [String("b".to_string()), Float(1.0)]
+])]
+#[case(HeaderRow::Row(1), &[
+    [Empty, Empty],
+    [String("a".to_string()), Float(0.0)],
+    [String("b".to_string()), Float(1.0)]
+])]
+#[case(HeaderRow::Row(2), &[
+    [String("a".to_string()), Float(0.0)],
+    [String("b".to_string()), Float(1.0)]
+])]
+fn test_no_header(#[case] header_row: HeaderRow, #[case] expected: &[[Data; 2]]) {
+    let mut excel: Xlsx<_> = wb("no-header.xlsx");
+    let range = excel
+        .with_header_row(header_row)
+        .worksheet_range_at(0)
+        .unwrap()
+        .unwrap();
+    range_eq!(range, expected);
+}