diff --git a/src/includes/class.dbconnection.php b/src/includes/class.dbconnection.php
index 5682ea2..4362db4 100644
--- a/src/includes/class.dbconnection.php
+++ b/src/includes/class.dbconnection.php
@@ -24,7 +24,7 @@ class DBConnection
         return self::$instance;
     }
 
-    public static function setPrefix($prefix)
+    public static function setTablePrefix($prefix)
     {
         $db = self::instance();
         $db->setPrefix($prefix);
diff --git a/src/includes/common.php b/src/includes/common.php
index 7e6b07d..14633d4 100644
--- a/src/includes/common.php
+++ b/src/includes/common.php
@@ -167,7 +167,7 @@ function idSignature(string $id, string $key, string $salt): string
     return hash_hmac('sha256', $id, $secret);
 }
 
-function isSignatureOk(string $signature, string $id, string $key, string $salt): bool
+function isValidSignature(string $signature, string $id, string $key, string $salt): bool
 {
     if ( hash_equals($signature, idSignature($id, $key, $salt)) ) return true;
     return false;
diff --git a/src/init.php b/src/init.php
index 5b3df13..3d20ecf 100644
--- a/src/init.php
+++ b/src/init.php
@@ -68,7 +68,7 @@ else {
     die("Incorrect database connection config");
 }
 
-DBConnection::setPrefix(MTT_DB_PREFIX);
+DBConnection::setTablePrefix(MTT_DB_PREFIX);
 DBCore::setDefaultInstance(new DBCore($db));
 Config::load();
 
@@ -118,7 +118,7 @@ function is_logged(): bool
     if ( !need_auth() ) return true;
     if ( !isset($_SESSION['logged']) || !isset($_SESSION['sign']) ) return false;
     if ( !(int)$_SESSION['logged'] ) return false;
-    return isSignatureOk($_SESSION['sign'], session_id(), Config::get('password'), defined('MTT_SALT') ? MTT_SALT : '');
+    return isValidSignature($_SESSION['sign'], session_id(), Config::get('password'), defined('MTT_SALT') ? MTT_SALT : '');
 }
 
 function is_readonly(): bool