diff --git a/ext/sockets/sockets.c b/ext/sockets/sockets.c
index 5b5525f6223ee..5cce920a2871e 100644
--- a/ext/sockets/sockets.c
+++ b/ext/sockets/sockets.c
@@ -2575,7 +2575,12 @@ PHP_FUNCTION(socket_addrinfo_lookup)
 		ZEND_HASH_FOREACH_STR_KEY_VAL(Z_ARRVAL_P(zhints), key, hint) {
 			if (key) {
 				if (zend_string_equals_literal(key, "ai_flags")) {
-					hints.ai_flags = zval_get_long(hint);
+#if HAVE_AI_IDN
+				    if (zval_get_long(hint) & (AI_IDN_ALLOW_UNASSIGNED | AI_IDN_USE_STD3_ASCII_RULES)) {
+                        php_error_docref(NULL, E_DEPRECATED, "AI_IDN_ALLOW_UNASSIGNED and AI_IDN_USE_STD3_ASCII_RULES is deprecated");
+                    }
+#endif
+				    hints.ai_flags = zval_get_long(hint);
 				} else if (zend_string_equals_literal(key, "ai_socktype")) {
 					hints.ai_socktype = zval_get_long(hint);
 				} else if (zend_string_equals_literal(key, "ai_protocol")) {