diff --git a/moo/lib/moo-utl.h b/moo/lib/moo-utl.h
index d6d1349..918e431 100644
--- a/moo/lib/moo-utl.h
+++ b/moo/lib/moo-utl.h
@@ -609,17 +609,37 @@ MOO_EXPORT moo_oow_t moo_count_bcstrl (
 
 /* ------------------------------------------------------------------------- */
 
-#define MOO_BYTE_TO_BCSTR_RADIXMASK (0xFF)
-#define MOO_BYTE_TO_BCSTR_LOWERCASE (1 << 8)
+#define MOO_BYTE_TO_OOCSTR_RADIXMASK (0xFF)
+#define MOO_BYTE_TO_OOCSTR_LOWERCASE (1 << 8)
+
+#define MOO_BYTE_TO_UCSTR_RADIXMASK MOO_BYTE_TO_OOCSTR_RADIXMASK
+#define MOO_BYTE_TO_UCSTR_LOWERCASE MOO_BYTE_TO_OOCSTR_LOWERCASE
+
+#define MOO_BYTE_TO_BCSTR_RADIXMASK MOO_BYTE_TO_OOCSTR_RADIXMASK
+#define MOO_BYTE_TO_BCSTR_LOWERCASE MOO_BYTE_TO_OOCSTR_LOWERCASE
+
+moo_oow_t moo_byte_to_ucstr (
+	moo_oob_t     byte,  
+	moo_uch_t*    buf,
+	moo_oow_t     size,
+	int           flagged_radix,
+	moo_uch_t     fill
+);
 
 moo_oow_t moo_byte_to_bcstr (
-	moo_uint8_t   byte,  
+	moo_oob_t     byte,  
 	moo_bch_t*    buf,
 	moo_oow_t     size,
 	int           flagged_radix,
 	moo_bch_t     fill
 );
 
+#if defined(MOO_OOCH_IS_UCH)
+#	define moo_byte_to_oocstr moo_byte_to_ucstr
+#else
+#	define moo_byte_to_oocstr moo_byte_to_bcstr
+#endif
+
 /* ------------------------------------------------------------------------- */
 
 MOO_EXPORT int moo_get_ucwidth (
diff --git a/moo/lib/utl.c b/moo/lib/utl.c
index 7e278ee..5760776 100644
--- a/moo/lib/utl.c
+++ b/moo/lib/utl.c
@@ -490,9 +490,43 @@ moo_oow_t moo_rotate_uchars (moo_uch_t* str, moo_oow_t len, int dir, moo_oow_t n
 
 /* ----------------------------------------------------------------------- */
 
-moo_oow_t moo_byte_to_bcstr (moo_uint8_t byte, moo_bch_t* buf, moo_oow_t size, int flagged_radix, moo_bch_t fill)
+moo_oow_t moo_byte_to_ucstr (moo_oob_t byte, moo_uch_t* buf, moo_oow_t size, int flagged_radix, moo_uch_t fill)
 {
-	moo_bch_t tmp[(MOO_SIZEOF(moo_uint8_t) * MOO_BITS_PER_BYTE)];
+	moo_uch_t tmp[(MOO_SIZEOF(moo_oob_t) * MOO_BITS_PER_BYTE)];
+	moo_uch_t* p = tmp, * bp = buf, * be = buf + size - 1;
+	int radix;
+	moo_uch_t radix_char;
+
+	radix = (flagged_radix & MOO_BYTE_TO_UCSTR_RADIXMASK);
+	radix_char = (flagged_radix & MOO_BYTE_TO_UCSTR_LOWERCASE)? 'a': 'A';
+	if (radix < 2 || radix > 36 || size <= 0) return 0;
+
+	do 
+	{
+		moo_oob_t digit = byte % radix;	
+		if (digit < 10) *p++ = digit + '0';
+		else *p++ = digit + radix_char - 10;
+		byte /= radix;
+	}
+	while (byte > 0);
+
+	if (fill != '\0') 
+	{
+		while (size - 1 > p - tmp) 
+		{
+			*bp++ = fill;
+			size--;
+		}
+	}
+
+	while (p > tmp && bp < be) *bp++ = *--p;
+	*bp = '\0';
+	return bp - buf;
+}
+
+moo_oow_t moo_byte_to_bcstr (moo_oob_t byte, moo_bch_t* buf, moo_oow_t size, int flagged_radix, moo_bch_t fill)
+{
+	moo_bch_t tmp[(MOO_SIZEOF(moo_oob_t) * MOO_BITS_PER_BYTE)];
 	moo_bch_t* p = tmp, * bp = buf, * be = buf + size - 1;
 	int radix;
 	moo_bch_t radix_char;
@@ -503,7 +537,7 @@ moo_oow_t moo_byte_to_bcstr (moo_uint8_t byte, moo_bch_t* buf, moo_oow_t size, i
 
 	do 
 	{
-		moo_uint8_t digit = byte % radix;	
+		moo_oob_t digit = byte % radix;	
 		if (digit < 10) *p++ = digit + '0';
 		else *p++ = digit + radix_char - 10;
 		byte /= radix;