diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index f43943fd962d..020edf2b1726 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -286,15 +286,15 @@ EXPORT_SYMBOL(amdtp_stream_set_parameters);
 unsigned int amdtp_stream_get_max_payload(struct amdtp_stream *s)
 {
 	unsigned int multiplier = 1;
-	unsigned int header_size = 0;
+	unsigned int cip_header_size = 0;
 
 	if (s->flags & CIP_JUMBO_PAYLOAD)
 		multiplier = 5;
 	if (!(s->flags & CIP_NO_HEADER))
-		header_size = 8;
+		cip_header_size = sizeof(__be32) * 2;
 
-	return header_size +
-		s->syt_interval * s->data_block_quadlets * 4 * multiplier;
+	return cip_header_size +
+		s->syt_interval * s->data_block_quadlets * sizeof(__be32) * multiplier;
 }
 EXPORT_SYMBOL(amdtp_stream_get_max_payload);