diff --git a/src/admin.php b/src/admin.php
index 0272a86..9a234ad 100644
--- a/src/admin.php
+++ b/src/admin.php
@@ -4,12 +4,7 @@
 define("PATH_TO_CONFIG", "/etc/flexisip-account-manager/");
 include PATH_TO_CONFIG . "xmlrpc.conf";
 
-if (USE_MYSQLI) {
-        include "mysqli-db.php";
-} else {
-        include "mysql-db.php";
-}
-
+include "mysqli-db.php";
 include "logging.php";
 include "utilities.php";
 include "xmlrpc-accounts.php";
@@ -75,4 +70,4 @@ if ($argc >= 2) {
         exit;
 }
 
-?>
\ No newline at end of file
+?>
diff --git a/src/sms-sender.php b/src/sms-sender.php
index 597d73d..9011b91 100644
--- a/src/sms-sender.php
+++ b/src/sms-sender.php
@@ -3,12 +3,7 @@
 define("PATH_TO_CONFIG", "/etc/flexisip-account-manager/");
 include PATH_TO_CONFIG . "xmlrpc.conf";
 
-if (USE_MYSQLI) {
-	include "mysqli-db.php";
-} else {
-	include "mysql-db.php";
-}
-
+include "mysqli-db.php";
 include "xmlrpc-sms.php";
 include "xmlrpc-accounts.php";
 include "xmlrpc-aliases.php";
diff --git a/src/xmlrpc.conf b/src/xmlrpc.conf
index 7fd9089..bb4dc6f 100644
--- a/src/xmlrpc.conf
+++ b/src/xmlrpc.conf
@@ -127,17 +127,8 @@ define("AUTH_REALM", "sip.example.org");
 
 /* ### Database configuration ### */
 
-/*
- * If set to True, use Mysqli API instead of Mysql one.
- *
- * Default value: False
- */
-define("USE_MYSQLI", False);
-
 /*
  * Whether or not use use persistent connections.
- * ! It only works if USE_MYSQLI is set to True !
- * See http://php.net/manual/fr/function.mysqli-connect.php and http://php.net/manual/fr/mysqli.quickstart.connections.php
  *
  * Default value: False
  */
diff --git a/src/xmlrpc.php b/src/xmlrpc.php
index ef04bf2..365e15e 100644
--- a/src/xmlrpc.php
+++ b/src/xmlrpc.php
@@ -7,12 +7,7 @@ include "logging.php";
 include "utilities.php";
 include "hooks.php";
 include "authentication.php";
-
-if (USE_MYSQLI) {
-	include "mysqli-db.php";
-} else {
-	include "mysql-db.php";
-}
+include "mysqli-db.php";
 
 if (SMS_API_ENABLED) {
 	include "xmlrpc-sms.php";