-PHP_HTTP_API STATUS php_http_env_set_response_code(long http_code TSRMLS_DC);
-PHP_HTTP_API STATUS php_http_env_set_response_protocol_version(php_http_version_t *v TSRMLS_DC);
-PHP_HTTP_API STATUS php_http_env_set_response_header(long http_code, const char *header_str, size_t header_len, zend_bool replace TSRMLS_DC);
-PHP_HTTP_API STATUS php_http_env_set_response_header_value(long http_code, const char *name_str, size_t name_len, zval *value, zend_bool replace TSRMLS_DC);
-PHP_HTTP_API STATUS php_http_env_set_response_header_format(long http_code, zend_bool replace TSRMLS_DC, const char *fmt, ...);
-PHP_HTTP_API STATUS php_http_env_set_response_header_va(long http_code, zend_bool replace, const char *fmt, va_list argv TSRMLS_DC);
+PHP_HTTP_API ZEND_RESULT_CODE php_http_env_set_response_code(long http_code TSRMLS_DC);
+PHP_HTTP_API ZEND_RESULT_CODE php_http_env_set_response_protocol_version(php_http_version_t *v TSRMLS_DC);
+PHP_HTTP_API ZEND_RESULT_CODE php_http_env_set_response_header(long http_code, const char *header_str, size_t header_len, zend_bool replace TSRMLS_DC);
+PHP_HTTP_API ZEND_RESULT_CODE php_http_env_set_response_header_value(long http_code, const char *name_str, size_t name_len, zval *value, zend_bool replace TSRMLS_DC);
+PHP_HTTP_API ZEND_RESULT_CODE php_http_env_set_response_header_format(long http_code, zend_bool replace TSRMLS_DC, const char *fmt, ...);
+PHP_HTTP_API ZEND_RESULT_CODE php_http_env_set_response_header_va(long http_code, zend_bool replace, const char *fmt, va_list argv TSRMLS_DC);