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-rw-r--r--src/kernel/window.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/kernel/window.c b/src/kernel/window.c
index 9d3db28..4d700bf 100644
--- a/src/kernel/window.c
+++ b/src/kernel/window.c
@@ -114,7 +114,7 @@ static void paint_and_above(const struct window *w) {
for (uint16_t y = ys; y < ym; ++y)
for (uint16_t x = xs; x < xm; ++x)
- buffer[(y + i->ypos) * VBE_MODE_INFO->width + x + i->xpos] = i->pixel_buffer_pma[y * i->width + x];
+ buffer[((y + i->ypos) & 0xffff) * VBE_MODE_INFO->width + ((x + i->xpos) & 0xffff)] = i->pixel_buffer_pma[y * i->width + x];
draw_hz_line(i->ypos - 2, i->xpos - 2, i->xpos + i->width + 2, BORDER_COLOR);
draw_hz_line(i->ypos - 1, i->xpos - 2, i->xpos + i->width + 2, BORDER_COLOR);