diff --git a/asc2log.c b/asc2log.c
index af019db..0596498 100644
--- a/asc2log.c
+++ b/asc2log.c
@@ -327,6 +327,15 @@ void eval_canfd(char* buf, struct timeval *date_tvp, char timestamps, int dplace
 			/* dlen is always 0 for classic CAN RTR frames
 			   but the DLC value is valid in RTR cases */
 			cf.len = dlc;
+			/* sanitize payload length value */
+			if (dlc > CAN_MAX_DLEN)
+				cf.len = CAN_MAX_DLEN;
+		}
+		/* check for extra DLC when having a Classic CAN with 8 bytes payload */
+		if ((cf.len == CAN_MAX_DLEN) && (dlc > CAN_MAX_DLEN) && (dlc <= CAN_MAX_RAW_DLC)) {
+			struct can_frame *ccf = (struct can_frame *)&cf;
+
+			ccf->len8_dlc = dlc;
 		}
 	}
 
diff --git a/log2asc.c b/log2asc.c
index 475be4a..6970869 100644
--- a/log2asc.c
+++ b/log2asc.c
@@ -116,6 +116,7 @@ void canfd_asc(struct canfd_frame *cf, int devno, int mtu, char *extra_info, FIL
 	char *dir = "Rx";
 	unsigned int flags = 0;
 	unsigned int dlen = cf->len;
+	unsigned int dlc = can_len2dlc(dlen);
 
 	/* relevant flags in Flags field */
 #define ASC_F_RTR 0x00000010
@@ -137,7 +138,16 @@ void canfd_asc(struct canfd_frame *cf, int devno, int mtu, char *extra_info, FIL
 	fprintf(outfile, "%11s                                  ", id);
 	fprintf(outfile, "%c ", (cf->flags & CANFD_BRS)?'1':'0');
 	fprintf(outfile, "%c ", (cf->flags & CANFD_ESI)?'1':'0');
-	fprintf(outfile, "%x ", can_len2dlc(dlen));
+
+	/* check for extra DLC when having a Classic CAN with 8 bytes payload */
+	if ((mtu == CAN_MTU) && (dlen == CAN_MAX_DLEN)) {
+		struct can_frame *ccf = (struct can_frame *)cf;
+
+		if ((ccf->len8_dlc > CAN_MAX_DLEN) && (ccf->len8_dlc <= CAN_MAX_RAW_DLC))
+			dlc = ccf->len8_dlc;
+	}
+
+	fprintf(outfile, "%x ", dlc);
 
 	if (mtu == CAN_MTU) {
 		if (cf->can_id & CAN_RTR_FLAG) {