diff --git a/lib/framework/utf.c b/lib/framework/utf.c
index 4ce3b1b1a..280fb7ec3 100644
--- a/lib/framework/utf.c
+++ b/lib/framework/utf.c
@@ -318,7 +318,7 @@ static size_t utf16_utf8_buffer_length(const utf_16_char* unicode_string)
 	return length;
 }
 
-char *UTF16toUTF8(const utf_16_char* unicode_string)
+char *UTF16toUTF8(const utf_16_char *unicode_string, size_t *nbytes)
 {
 	const utf_16_char* curChar;
 
@@ -343,6 +343,12 @@ char *UTF16toUTF8(const utf_16_char* unicode_string)
 	// Terminate the string with a nul character
 	utf8_string[utf8_length] = '\0';
 
+	// Set the number of bytes allocated
+	if (nbytes)
+	{
+		*nbytes = utf8_length + 1;
+	}
+
 	return utf8_string;
 }
 
@@ -376,7 +382,7 @@ static size_t utf8_as_utf16_buf_size(const char* utf8_string)
 	return length;
 }
 
-utf_16_char *UTF8toUTF16(const char* utf8_string)
+utf_16_char *UTF8toUTF16(const char* utf8_string, size_t *nbytes)
 {
 	const char* curChar = utf8_string;
 	const size_t unicode_length = utf8_as_utf16_buf_size(utf8_string);
@@ -399,6 +405,12 @@ utf_16_char *UTF8toUTF16(const char* utf8_string)
 	// Terminate the string with a nul
 	unicode_string[unicode_length] = '\0';
 
+	// Set the number of bytes allocated
+	if (nbytes)
+	{
+		*nbytes = sizeof(utf_16_char) * (unicode_length + 1);
+	}
+
 	return unicode_string;
 }
 
diff --git a/lib/framework/utf.h b/lib/framework/utf.h
index eb7e5ebbb..74325c376 100644
--- a/lib/framework/utf.h
+++ b/lib/framework/utf.h
@@ -68,15 +68,17 @@ size_t UTF16CharacterCount(const uint16_t *utf16);
 
 /** Encodes a UTF-16 encoded unicode string to a UTF-8 encoded string
  *  \param unicode_string the UTF-16 encoded unicode string to encode into UTF-8
+ *  \param[out] nbytes the number of bytes allocated, may be NULL
  *  \return a UTF-8 encoded unicode nul terminated string (use free() to deallocate it)
  */
-char *UTF16toUTF8(const utf_16_char *unicode_string);
+char *UTF16toUTF8(const utf_16_char *unicode_string, size_t *nbytes);
 
 /** Decodes a UTF-8 encode string to a UTF-16 encoded string (native endianess)
  *  \param utf8_string a UTF-8 encoded nul terminated string
+ *  \param[out] nbytes the number of bytes allocated, may be NULL
  *  \return a UTF-16 encoded unicode nul terminated string (use free() to deallocate it)
  */
-utf_16_char *UTF8toUTF16(const char *utf8_string);
+utf_16_char *UTF8toUTF16(const char *utf8_string, size_t *nbytes);
 
 char *UTF8CharacterAtOffset(const char *utf8_string, size_t index);
 utf_16_char *UTF16CharacterAtOffset(const utf_16_char *utf16_string, size_t index);