diff --git a/drivers/video/fbdev/arkfb.c b/drivers/video/fbdev/arkfb.c
index ed76ddc..a2a3816 100644
--- a/drivers/video/fbdev/arkfb.c
+++ b/drivers/video/fbdev/arkfb.c
@@ -797,6 +797,8 @@
 	value = ((value * hmul / hdiv) / 8) - 5;
 	vga_wcrt(par->state.vgabase, 0x42, (value + 1) / 2);
 
+	if (screen_size > info->screen_size)
+		screen_size = info->screen_size;
 	memset_io(info->screen_base, 0x00, screen_size);
 	/* Device and screen back on */
 	svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80);