diff --git a/drivers/video/fbdev/kyro/fbdev.c b/drivers/video/fbdev/kyro/fbdev.c
index 25801e8e3f74a9ff0ba1cbd59913dcab6f76e3c4..d57772f96ad26718eb01c0ab83dd6f870364c889 100644
--- a/drivers/video/fbdev/kyro/fbdev.c
+++ b/drivers/video/fbdev/kyro/fbdev.c
@@ -494,6 +494,8 @@ static int kyrofb_set_par(struct fb_info *info)
 				    info->var.hsync_len +
 				    info->var.left_margin)) / 1000;
 
+	if (!lineclock)
+		return -EINVAL;
 
 	/* time for a frame in ns (precision in 32bpp) */
 	frameclock = lineclock * (info->var.yres +