diff --git a/skeletons/OCTET_STRING.c b/skeletons/OCTET_STRING.c
index e3b7a0a..af41596 100644
--- a/skeletons/OCTET_STRING.c
+++ b/skeletons/OCTET_STRING.c
@@ -621,12 +621,68 @@
 	_ASN_ENCODE_FAILED;
 }
 
+static struct OCTET_STRING__xer_escape_table_s {
+	char *string;
+	int size;
+} OCTET_STRING__xer_escape_table[] = {
+#define	OSXET(s)	{ s, sizeof(s) - 1 }
+	OSXET("\074\156\165\154\057\076"),	/* <nul/> */
+	OSXET("\074\163\157\150\057\076"),	/* <soh/> */
+	OSXET("\074\163\164\170\057\076"),	/* <stx/> */
+	OSXET("\074\145\164\170\057\076"),	/* <etx/> */
+	OSXET("\074\145\157\164\057\076"),	/* <eot/> */
+	OSXET("\074\145\156\161\057\076"),	/* <enq/> */
+	OSXET("\074\141\143\153\057\076"),	/* <ack/> */
+	OSXET("\074\142\145\154\057\076"),	/* <bel/> */
+	OSXET("\074\142\163\057\076"),		/* <bs/> */
+	OSXET("\011"),				/* \t */
+	OSXET("\012"),				/* \n */
+	OSXET("\074\166\164\057\076"),		/* <vt/> */
+	OSXET("\074\146\146\057\076"),		/* <ff/> */
+	OSXET("\015"),				/* \r */
+	OSXET("\074\163\157\057\076"),		/* <so/> */
+	OSXET("\074\163\151\057\076"),		/* <si/> */
+	OSXET("\074\144\154\145\057\076"),	/* <dle/> */
+	OSXET("\074\144\143\061\057\076"),	/* <de1/> */
+	OSXET("\074\144\143\062\057\076"),	/* <de2/> */
+	OSXET("\074\144\143\063\057\076"),	/* <de3/> */
+	OSXET("\074\144\143\064\057\076"),	/* <de4/> */
+	OSXET("\074\156\141\153\057\076"),	/* <nak/> */
+	OSXET("\074\163\171\156\057\076"),	/* <syn/> */
+	OSXET("\074\145\164\142\057\076"),	/* <etb/> */
+	OSXET("\074\143\141\156\057\076"),	/* <can/> */
+	OSXET("\074\145\155\057\076"),		/* <em/> */
+	OSXET("\074\163\165\142\057\076"),	/* <sub/> */
+	OSXET("\074\145\163\143\057\076"),	/* <esc/> */
+	OSXET("\074\151\163\064\057\076"),	/* <is4/> */
+	OSXET("\074\151\163\063\057\076"),	/* <is3/> */
+	OSXET("\074\151\163\062\057\076"),	/* <is2/> */
+	OSXET("\074\151\163\061\057\076"),	/* <is1/> */
+	{ 0, 0 },	/* " " */
+	{ 0, 0 },	/* ! */
+	{ 0, 0 },	/* \" */
+	{ 0, 0 },	/* # */
+	{ 0, 0 },	/* $ */
+	{ 0, 0 },	/* % */
+	OSXET("\046\141\155\160\073"),	/* &amp; */
+	{ 0, 0 },	/* ' */
+	{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, /* ()*+,-./ */
+	{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, /* 01234567 */
+	{0,0},{0,0},{0,0},{0,0},			 /* 89:; */
+	OSXET("\046\154\164\073"),	/* &lt; */
+	{ 0, 0 },	/* = */
+	OSXET("\046\147\164\073"),	/* &gt; */
+};
+
 asn_enc_rval_t
 OCTET_STRING_encode_xer_ascii(asn_TYPE_descriptor_t *td, void *sptr,
 	int ilevel, enum xer_encoder_flags_e flags,
 		asn_app_consume_bytes_f *cb, void *app_key) {
 	const OCTET_STRING_t *st = (const OCTET_STRING_t *)sptr;
 	asn_enc_rval_t er;
+	uint8_t *buf, *end;
+	uint8_t *ss;	/* Sequence start */
+	ssize_t encoded_len = 0;
 
 	(void)ilevel;	/* Unused argument */
 	(void)flags;	/* Unused argument */
@@ -634,10 +690,32 @@
 	if(!st || !st->buf)
 		_ASN_ENCODE_FAILED;
 
-	if(cb(st->buf, st->size, app_key) < 0)
-		_ASN_ENCODE_FAILED;
-	er.encoded = st->size;
+	buf = st->buf;
+	end = buf + st->size;
+	for(ss = buf; buf < end; buf++) {
+		int ch = *buf;
+		int s_len;	/* Special encoding sequence length */
 
+		/*
+		 * Escape certain characters: X.680/11.15
+		 */
+		if(ch < sizeof(OCTET_STRING__xer_escape_table)
+			/sizeof(OCTET_STRING__xer_escape_table[0])
+		&& (s_len = OCTET_STRING__xer_escape_table[ch].size)) {
+			if(((buf - ss) && cb(ss, buf - ss, app_key) < 0)
+			|| cb(OCTET_STRING__xer_escape_table[ch].string, s_len,
+					app_key) < 0)
+				_ASN_ENCODE_FAILED;
+			encoded_len += (buf - ss) + s_len;
+			ss = buf + 1;
+		}
+	}
+
+	encoded_len += (buf - ss);
+	if((buf - ss) && cb(ss, buf - ss, app_key) < 0)
+		_ASN_ENCODE_FAILED;
+
+	er.encoded = encoded_len;
 	return er;
 }