diff --git a/doc/configuration.txt b/doc/configuration.txt
index 0a111eb0c..afcf4488b 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -25759,6 +25759,10 @@ Flags are :
           syslog endpoints.
           As with json encoding, incomplete numerical values will be encoded
           as-is and '+E' option will be ignored.
+          When combined with '+bin' option, it will directly generate raw
+          binary CBOR payload. Be careful, because it will obviously generate
+          non-printable chars, thus it is mainly intented for use with
+          set-var-fmt, rings and binary-capable log endpoints.
 
   Example:
 
diff --git a/src/log.c b/src/log.c
index 6354f63a8..2e8e1b281 100644
--- a/src/log.c
+++ b/src/log.c
@@ -1774,8 +1774,15 @@ static char *_encode_byte_hex(char *start, char *stop, unsigned char byte)
 static char *_lf_cbor_encode_byte(struct cbor_encode_ctx *cbor_ctx,
                                   char *start, char *stop, unsigned char byte)
 {
-	__maybe_unused struct lf_buildctx *ctx = cbor_ctx->e_byte_fct_ctx;
+	struct lf_buildctx *ctx = cbor_ctx->e_byte_fct_ctx;
 
+	if (ctx->options & LOG_OPT_BIN) {
+		/* raw output */
+		if ((stop - start) < 1)
+			return NULL;
+		*start++ = byte;
+		return start;
+	}
 	return _encode_byte_hex(start, stop, byte);
 }