diff --git a/include/osmocom/bsc/bsc_msc_data.h b/include/osmocom/bsc/bsc_msc_data.h
index 5202174..debd240 100644
--- a/include/osmocom/bsc/bsc_msc_data.h
+++ b/include/osmocom/bsc/bsc_msc_data.h
@@ -79,6 +79,7 @@
 
 	/* audio codecs */
 	struct gsm48_multi_rate_conf amr_conf;
+	bool amr_octet_aligned;
 	struct gsm_audio_support **audio_support;
 	int audio_length;
 	enum bsc_lcls_mode lcls_mode;