diff -up Firebird-4.0.4.3010-0/builds/install/misc/firebird.conf._orig Firebird-4.0.4.3010-0/builds/install/misc/firebird.conf
--- Firebird-4.0.4.3010-0/builds/install/misc/firebird.conf._orig	2023-11-08 13:07:47.000000000 +0100
+++ Firebird-4.0.4.3010-0/builds/install/misc/firebird.conf	2023-12-20 11:20:04.132941663 +0100
@@ -735,7 +735,7 @@
 #
 #	Type: string
 #
-#DataTypeCompatibility =
+DataTypeCompatibility = 3.0
 
 
 # ----------------------------
@@ -1200,3 +1200,5 @@
 # Type: integer
 #
 #ExtConnPoolLifeTime = 7200
+
+include conf.d/*.conf