-PHP_HTTP_API http_message *_http_message_parse_ex(const char *message, size_t length, zend_bool duplicate TSRMLS_DC);
+PHP_HTTP_API http_message *_http_message_parse_ex(char *message, size_t length, zend_bool duplicate TSRMLS_DC);
+
+#define http_message_parse_headers_callback _http_message_parse_headers_callback
+PHP_HTTP_API void _http_message_parse_headers_callback(void *message, char *http_line, size_t line_length, HashTable **headers TSRMLS_DC);