#define http_parse_headers(h, a) _http_parse_headers_ex((h), Z_ARRVAL_P(a), 1, _http_parse_headers_default_callback, NULL TSRMLS_CC)
#define http_parse_headers_ex(h, ht, p) _http_parse_headers_ex((h), (ht), (p), _http_parse_headers_default_callback, NULL TSRMLS_CC)
#define http_parse_headers_cb(h, ht, p, f, d) _http_parse_headers_ex((h), (ht), (p), (f), (d) TSRMLS_CC)
-PHP_HTTP_API STATUS _http_parse_headers_ex(const char *header, HashTable *headers, zend_bool prettify, http_parse_headers_callback_t func, void *callback_data TSRMLS_DC);
+PHP_HTTP_API STATUS _http_parse_headers_ex(const char *header, HashTable *headers, zend_bool prettify, http_parse_headers_callback_t func, void **callback_data TSRMLS_DC);
#define http_parse_cookie(c, ht) _http_parse_cookie((c), (ht) TSRMLS_CC)
PHP_HTTP_API STATUS _http_parse_cookie(const char *cookie, HashTable *values TSRMLS_DC);