UPGRADING

diff --git a/UPGRADING b/UPGRADING
index 85aba415ca856cfeae76fa70a5b168875f1edf93..d35d1b4cd65592d74633a489a63b11b85ae54c06 100644 (file)
--- a/UPGRADING
+++ b/UPGRADING
@@ -356,3 +356,6 @@ See also: https://wiki.php.net/rfc/deprecations_php_7_2
 13. Other Changes
 ========================================
 
+- Build system
+
+  Autoconf minimal version is now 2.64.