diff --git a/crates/egui/src/text_selection/visuals.rs b/crates/egui/src/text_selection/visuals.rs
index 35ee666e2db..2a31d1e1270 100644
--- a/crates/egui/src/text_selection/visuals.rs
+++ b/crates/egui/src/text_selection/visuals.rs
@@ -96,6 +96,8 @@ pub fn paint_text_selection(
 pub fn paint_cursor_end(painter: &Painter, visuals: &Visuals, cursor_rect: Rect) {
     let stroke = visuals.text_cursor.stroke;
 
+    // Ensure the cursor is aligned to the pixel grid for whole number widths.
+    // See https://github.com/emilk/egui/issues/5164
     let (top, bottom) = if (stroke.width as usize) % 2 == 0 {
         (
             painter.round_pos_to_pixels(cursor_rect.center_top()),