diff --git a/admin/check/check_database_inc.php b/admin/check/check_database_inc.php
index a8aec47451..b4ff814b8c 100644
--- a/admin/check/check_database_inc.php
+++ b/admin/check/check_database_inc.php
@@ -51,7 +51,7 @@
 	# This bug has been fixed in ADOdb 5.11 (May 5, 2010) but we still
 	# need to use the backwards compatible approach to detect ADOdb <5.11.
 	if( preg_match( '/^[Vv]([0-9\.]+)/', $ADODB_vers, $t_matches ) == 1 ) {
-		$t_adodb_version_check_ok = version_compare( $t_matches[1], '5.10', '>=' );
+		$t_adodb_version_check_ok = version_compare( $t_matches[1], DB_MIN_VERSION_ADODB, '>=' );
 		$t_adodb_version_info = 'ADOdb version ' . htmlentities( $t_matches[1] ) . ' was found.';
 	}
 
@@ -63,7 +63,7 @@
 	);
 }
 check_print_test_row(
-	'Version of <a href="http://en.wikipedia.org/wiki/ADOdb">ADOdb</a> available is at least 5.11',
+	'Version of <a href="http://en.wikipedia.org/wiki/ADOdb">ADOdb</a> available is at least ' . DB_MIN_VERSION_ADODB,
 	$t_adodb_version_check_ok,
 	$t_adodb_version_info
 );
diff --git a/admin/install.php b/admin/install.php
index dcf1adb02d..250515b172 100644
--- a/admin/install.php
+++ b/admin/install.php
@@ -306,21 +306,11 @@ function print_test( $p_test_description, $p_result, $p_hard_fail = true, $p_mes
 	print_test( 'Checking PHP support for database type', db_check_database_support( $f_db_type ), true, 'database is not supported by PHP. Check that it has been compiled into your server.' );
 
 	# ADOdb library version check
-	# PostgreSQL, Oracle and MSSQL require at least 5.18.
-	# @TODO dregad 20131001 req is 5.19 actually, but must wait until official release
-	# MySQL should be fine with 5.10
+	# PostgreSQL, Oracle and MSSQL require at least 5.19. MySQL should be fine
+	# with 5.10 but to simplify we align to the requirement of the others.
 	$t_adodb_version = substr( $ADODB_vers, 1, strpos( $ADODB_vers, ' ' ) - 1 );
-	switch( $f_db_type ) {
-		case 'mssqlnative':
-		case 'oci8' :
-		case 'pgsql' :
-			$t_adodb_min = '5.18';
-			break;
-		default:
-			$t_adodb_min = '5.10';
-	}
-	print_test( "Checking ADOdb Library version is at least $t_adodb_min",
-		version_compare( $t_adodb_version, $t_adodb_min, '>=' ),
+	print_test( "Checking ADOdb Library version is at least " . DB_MIN_VERSION_ADODB,
+		version_compare( $t_adodb_version, DB_MIN_VERSION_ADODB, '>=' ),
 		true,
 		'Current version: ' . $ADODB_vers
 	);
diff --git a/core/constant_inc.php b/core/constant_inc.php
index b92c5677d0..ef5892f1da 100644
--- a/core/constant_inc.php
+++ b/core/constant_inc.php
@@ -39,6 +39,7 @@
 
 # installation
 define( 'CONFIGURED_PASSWORD', "______" );
+define( 'DB_MIN_VERSION_ADODB', '5.19dev' ); # For mssql, oracle and pgsql
 define( 'DB_MIN_VERSION_MSSQL', '9.0.0' );
 define( 'DB_MIN_VERSION_MYSQL', '5.0.8' );   # See #16584
 define( 'DB_MIN_VERSION_PGSQL', '8.4' );     # Earliest supported version as of Jan 2014