diff --git a/drivers/media/video/zoran_driver.c b/drivers/media/video/zoran_driver.c
index 4dbe2d449b509dfafa3a38fe3e99dbdafc7647bf..d831ca16d9e998eb464db06992a955cbc8fd6578 100644
--- a/drivers/media/video/zoran_driver.c
+++ b/drivers/media/video/zoran_driver.c
@@ -3196,7 +3196,7 @@ zoran_do_ioctl (struct inode *inode,
 			"%s: VIDIOC_QUERYBUF - index=%d, type=%d\n",
 			ZR_DEVNAME(zr), buf->index, buf->type);
 
-		memset(buf, 0, sizeof(buf));
+		memset(buf, 0, sizeof(*buf));
 		buf->type = type;
 		buf->index = index;