diff --git a/src/video/vid_tandy.c b/src/video/vid_tandy.c
index 312527a35..0609ca378 100644
--- a/src/video/vid_tandy.c
+++ b/src/video/vid_tandy.c
@@ -483,7 +483,7 @@ vid_poll(void *priv)
                     vid->memaddr++;
                     if (vid->scanline & 8) {
                         for (c = 0; c < 8; c++)
-                            buffer32->line[vid->displine << 1][(x << 4) + (c << 1) + 8] = buffer32->line[vid->displine << 1][(x << 4) + (c << 1) + 1 + 8] = cols[0];
+                            buffer32->line[vid->displine << 1][(x << 4) + (c << 1) + 8] = buffer32->line[(vid->displine << 1) + 1][(x << 4) + (c << 1) + 8] = buffer32->line[vid->displine << 1][(x << 4) + (c << 1) + 1 + 8] = buffer32->line[(vid->displine << 1) + 1][(x << 4) + (c << 1) + 1 + 8] = cols[0];
                     } else {
                         for (c = 0; c < 8; c++) {
                             if (vid->scanline == 8) {
@@ -824,4 +824,4 @@ const device_t tandy_1000sl_video_device = {
     .speed_changed = tandy_vid_speed_changed,
     .force_redraw  = NULL,
     .config        = NULL
-};
\ No newline at end of file
+};