diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index 2f1c03783414..9db0dac938d3 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -879,6 +879,7 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 	int compatible_arg = 1;
 	long err = 0;
 
+	memset(&karg, 0, sizeof(karg));
 	/* First, convert the command. */
 	switch (cmd) {
 	case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break;