diff --git a/screen-write.c b/screen-write.c
index e351a5e5..8cc81f92 100644
--- a/screen-write.c
+++ b/screen-write.c
@@ -596,7 +596,7 @@ screen_write_hline(struct screen_write_ctx *ctx, u_int nx, int left, int right)
 	screen_write_set_cursor(ctx, cx, cy);
 }
 
-/* Draw a horizontal line on screen. */
+/* Draw a vertical line on screen. */
 void
 screen_write_vline(struct screen_write_ctx *ctx, u_int ny, int top, int bottom)
 {
diff --git a/tty.c b/tty.c
index e0a3f6b6..cb0fdec0 100644
--- a/tty.c
+++ b/tty.c
@@ -1463,9 +1463,15 @@ tty_draw_line(struct tty *tty, struct screen *s, u_int px, u_int py, u_int nx,
 				tty_attributes(tty, &last, defaults, palette);
 				tty_cursor(tty, atx + ux, aty);
 				for (j = 0; j < gcp->data.width; j++) {
-					if (ux + j > nx)
+					if (ux > nx)
 						break;
-					tty_putc(tty, ' ');
+					if (tty_check_overlay(tty, atx + ux,
+					    aty))
+						tty_putc(tty, ' ');
+					else {
+						tty_cursor(tty, atx + ux + 1,
+						    aty);
+					}
 					ux++;
 				}
 			}