diff --git a/include/osmocom/bsc/bsc_msc_data.h b/include/osmocom/bsc/bsc_msc_data.h
index 79d2eca..7ec3442 100644
--- a/include/osmocom/bsc/bsc_msc_data.h
+++ b/include/osmocom/bsc/bsc_msc_data.h
@@ -87,6 +87,7 @@
 	struct gsm_audio_support **audio_support;
 	int audio_length;
 	enum bsc_lcls_mode lcls_mode;
+	bool lcls_codec_mismatch_allow;
 
 	/* ussd welcome text */
 	char *ussd_welcome_txt;