diff --git a/ykval-db-oci.php b/ykval-db-oci.php
index 7bf1848..fe4dc1a 100644
--- a/ykval-db-oci.php
+++ b/ykval-db-oci.php
@@ -8,7 +8,7 @@
 require_once('ykval-log.php');
 require_once('ykval-db.php');
 
-class DbImpl extends DB
+class DbImpl extends Db
 {
   /**
    * Constructor
diff --git a/ykval-db-pdo.php b/ykval-db-pdo.php
index 5f7070f..603094a 100644
--- a/ykval-db-pdo.php
+++ b/ykval-db-pdo.php
@@ -8,7 +8,7 @@
 require_once('ykval-log.php');
 require_once('ykval-db.php');
 
-class DbImpl
+class DbImpl extends Db
 {