@@ -793,11 +793,11 @@
  * use the result outside the scope of the current autorelease pool, you have to
  * copy it.
  *
  * \return The string as an array of Unicode characters
  */
-- (of_unichar_t*)unicodeString;
+- (const of_unichar_t*)unicodeString;
 
 /**
  * \brief Writes the string into the specified file using UTF-8 encoding.
  *
  * \param path The path of the file to write to