diff --git a/include/osmocom/msc/transaction.h b/include/osmocom/msc/transaction.h
index 0966627a3..8fae86a4e 100644
--- a/include/osmocom/msc/transaction.h
+++ b/include/osmocom/msc/transaction.h
@@ -17,15 +17,18 @@ struct vty;
 /* Used for late TID assignment */
 #define TRANS_ID_UNASSIGNED 0xff
 
+#define LOG_TRANS_CAT_SRC(trans, subsys, file, line, level, fmt, args...) \
+	LOGPSRC(subsys, level, file, line, \
+		"trans(%s %s callref-0x%x tid-%u%s) " fmt, \
+		(trans) ? trans_name(trans) : "NULL", \
+		(trans) ? ((trans)->msc_a ? (trans)->msc_a->c.fi->id : vlr_subscr_name((trans)->vsub)) : "NULL", \
+		(trans) ? (trans)->callref : 0, \
+		(trans) ? (trans)->transaction_id : 0, \
+		(trans) && (trans)->paging_request ? ",PAGING" : "", \
+		##args)
+
 #define LOG_TRANS_CAT(trans, subsys, level, fmt, args...) \
-	LOGP(subsys, level, \
-	     "trans(%s %s callref-0x%x tid-%u%s) " fmt, \
-	     (trans) ? trans_name(trans) : "NULL", \
-	     (trans) ? ((trans)->msc_a ? (trans)->msc_a->c.fi->id : vlr_subscr_name((trans)->vsub)) : "NULL", \
-	     (trans) ? (trans)->callref : 0, \
-	     (trans) ? (trans)->transaction_id : 0, \
-	     (trans) && (trans)->paging_request ? ",PAGING" : "", \
-	     ##args)
+	LOG_TRANS_CAT_SRC(trans, subsys, __FILE__, __LINE__, level, fmt, ##args)
 
 #define LOG_TRANS(trans, level, fmt, args...) \
 	     LOG_TRANS_CAT(trans, (trans) ? (trans)->log_subsys : DMSC, level, fmt, ##args)
diff --git a/src/libmsc/gsm_04_08_cc.c b/src/libmsc/gsm_04_08_cc.c
index a0714beb5..fe5bf4ac7 100644
--- a/src/libmsc/gsm_04_08_cc.c
+++ b/src/libmsc/gsm_04_08_cc.c
@@ -229,13 +229,15 @@ static void gsm48_stop_cc_timer(struct gsm_trans *trans)
 	}
 }
 
-static int mncc_recvmsg(struct gsm_network *net, struct gsm_trans *trans,
+#define mncc_recvmsg(net, trans, msg_type, mncc) \
+	_mncc_recvmsg(__FILE__, __LINE__, net, trans, msg_type, mncc)
+static int _mncc_recvmsg(const char *file, int line, struct gsm_network *net, struct gsm_trans *trans,
 			int msg_type, struct gsm_mncc *mncc)
 {
 	struct msgb *msg;
 	unsigned char *data;
 
-	LOG_TRANS_CAT(trans, DMNCC, LOGL_DEBUG, "tx %s\n", get_mncc_name(msg_type));
+	LOG_TRANS_CAT_SRC(trans, DMNCC, file, line, LOGL_DEBUG, "tx %s\n", get_mncc_name(msg_type));
 
 	mncc->msg_type = msg_type;