diff --git a/asc2log.c b/asc2log.c
index 805d017..e1453c7 100644
--- a/asc2log.c
+++ b/asc2log.c
@@ -131,8 +131,10 @@ void eval_can(char* buf, struct timeval *date_tvp, char timestamps, char base, i
 	static struct timeval tv; /* current frame timestamp */
 	static struct timeval read_tv; /* frame timestamp from ASC file */
 	struct canfd_frame cf;
+	struct can_frame *ccf = (struct can_frame *)&cf; /* for len8_dlc */
 	char rtr;
 	int dlc = 0;
+	int len = 0;
 	int data[8];
 	char tmp1[BUFLEN];
 	char dir[3]; /* 'Rx' or 'Tx' plus terminating zero */
@@ -164,7 +166,7 @@ void eval_can(char* buf, struct timeval *date_tvp, char timestamps, char base, i
 
 	if (base == 'h') { /* check for CAN frames with hexadecimal values */
 
-		items = sscanf(buf, "%lu.%lu %d %s %2s %c %d %x %x %x %x %x %x %x %x",
+		items = sscanf(buf, "%lu.%lu %d %s %2s %c %x %x %x %x %x %x %x %x %x",
 			       &read_tv.tv_sec, &read_tv.tv_usec, &interface,
 			       tmp1, dir, &rtr, &dlc,
 			       &data[0], &data[1], &data[2], &data[3],
@@ -173,7 +175,17 @@ void eval_can(char* buf, struct timeval *date_tvp, char timestamps, char base, i
 		if (items < 7 ) /* make sure we've read the dlc */
 			return;
 
-		if ((items == dlc + 7 ) || /* data frame */
+		/* dlc is one character hex value 0..F */
+		if (dlc > CAN_MAX_RAW_DLC)
+			return;
+
+		/* retrieve real data length */
+		if (dlc > CAN_MAX_DLC)
+			len = CAN_MAX_DLEN;
+		else
+			len = dlc;
+
+		if ((items == len + 7 ) || /* data frame */
 		    ((items == 6) && (rtr == 'r')) || /* RTR without DLC */
 		    ((items == 7) && (rtr == 'r'))) { /* RTR with DLC */
 			found = 1;
@@ -182,7 +194,7 @@ void eval_can(char* buf, struct timeval *date_tvp, char timestamps, char base, i
 
 	} else { /* check for CAN frames with decimal values */
 
-		items = sscanf(buf, "%lu.%lu %d %s %2s %c %d %d %d %d %d %d %d %d %d",
+		items = sscanf(buf, "%lu.%lu %d %s %2s %c %x %d %d %d %d %d %d %d %d",
 			       &read_tv.tv_sec, &read_tv.tv_usec, &interface,
 			       tmp1, dir, &rtr, &dlc,
 			       &data[0], &data[1], &data[2], &data[3],
@@ -191,7 +203,17 @@ void eval_can(char* buf, struct timeval *date_tvp, char timestamps, char base, i
 		if (items < 7 ) /* make sure we've read the dlc */
 			return;
 
-		if ((items == dlc + 7 ) || /* data frame */
+		/* dlc is one character hex value 0..F */
+		if (dlc > CAN_MAX_RAW_DLC)
+			return;
+
+		/* retrieve real data length */
+		if (dlc > CAN_MAX_DLC)
+			len = CAN_MAX_DLEN;
+		else
+			len = dlc;
+
+		if ((items == len + 7 ) || /* data frame */
 		    ((items == 6) && (rtr == 'r')) || /* RTR without DLC */
 		    ((items == 7) && (rtr == 'r'))) { /* RTR with DLC */
 			found = 1;
@@ -201,8 +223,9 @@ void eval_can(char* buf, struct timeval *date_tvp, char timestamps, char base, i
 
 	if (found) {
 
+		/* dlc > 8 => len == CAN_MAX_DLEN => fill len8_dlc value */
 		if (dlc > CAN_MAX_DLC)
-			return;
+			ccf->len8_dlc = dlc;
 
 		if (strlen(dir) != 2) /* "Rx" or "Tx" */
 			return;
@@ -212,11 +235,11 @@ void eval_can(char* buf, struct timeval *date_tvp, char timestamps, char base, i
 		else
 			extra_info = " T\n";
 
-		cf.len = dlc;
+		cf.len = len;
 		if (rtr == 'r')
 			cf.can_id |= CAN_RTR_FLAG;
 		else
-			for (i = 0; i < dlc; i++)
+			for (i = 0; i < len; i++)
 				cf.data[i] = data[i] & 0xFFU;
 
 		calc_tv(&tv, &read_tv, date_tvp, timestamps, dplace);
diff --git a/log2asc.c b/log2asc.c
index 2bbd05c..a1cf364 100644
--- a/log2asc.c
+++ b/log2asc.c
@@ -71,11 +71,13 @@ void print_usage(char *prg)
 	fprintf(stderr, "         -r  (suppress dlc for RTR frames - pre v8.5 tools)\n");
 }
 
-void can_asc(struct canfd_frame *cf, int devno, int nortrdlc, char *extra_info, FILE *outfile)
+void can_asc(struct canfd_frame *cfd, int devno, int nortrdlc, char *extra_info, FILE *outfile)
 {
 	int i;
 	char id[10];
 	char *dir = "Rx";
+	int dlc;
+	struct can_frame *cf = (struct can_frame *)cfd; /* for len8_dlc */
 
 	fprintf(outfile, "%-2d ", devno); /* channel number left aligned */
 
@@ -94,13 +96,20 @@ void can_asc(struct canfd_frame *cf, int devno, int nortrdlc, char *extra_info,
 
 		fprintf(outfile, "%-15s %s   ", id, dir);
 
+		if (cf->len == CAN_MAX_DLC &&
+		    cf->len8_dlc > CAN_MAX_DLC &&
+		    cf->len8_dlc <= CAN_MAX_RAW_DLC)
+			dlc = cf->len8_dlc;
+		else
+			dlc = cf->len;
+
 		if (cf->can_id & CAN_RTR_FLAG) {
 			if (nortrdlc)
 				fprintf(outfile, "r"); /* RTR frame */
 			else
-				fprintf(outfile, "r %d", cf->len); /* RTR frame */
+				fprintf(outfile, "r %X", dlc); /* RTR frame */
 		} else {
-			fprintf(outfile, "d %d", cf->len); /* data frame */
+			fprintf(outfile, "d %X", dlc); /* data frame */
 
 			for (i = 0; i < cf->len; i++) {
 				fprintf(outfile, " %02X", cf->data[i]);