amr: don't rely on pad bits to be zero

Change-Id: I354fbbcbaf7ff7e7d498b22c175a57a79b6b8856

1 files changed, 1 insertions, 1 deletions

diff --git a/src/amr.c b/src/amr.c
index 2706432..0cd1821 100644
--- a/src/amr.c
+++ b/src/amr.c
@@ -152,7 +152,7 @@ int osmo_amr_oa_to_bwe(uint8_t *payload, unsigned int payload_len)
 		return -1;
 
 	/* Move TOC close to CMR */
-	payload[0] |= (payload[1] >> 4) & 0x0f;
+	payload[0] = (payload[0] & 0xf0) | ((payload[1] >> 4) & 0x0f);
 	payload[1] = (payload[1] << 4) & 0xf0;
 
 	for (i = 0; i < frame_len; i++) {