diff --git a/src/MTProto.php b/src/MTProto.php
index 706d8c778a..d05ea76354 100644
--- a/src/MTProto.php
+++ b/src/MTProto.php
@@ -139,7 +139,7 @@ final class MTProto implements TLCallback, LoggerGetter
      *
      * @var string
      */
-    const RELEASE = '8.0.0-beta90';
+    const RELEASE = '8.0.0-beta91';
     /**
      * We're not logged in.
      *
diff --git a/src/Namespace/AbstractAPI.php b/src/Namespace/AbstractAPI.php
index 22911470a7..883ffd6b67 100644
--- a/src/Namespace/AbstractAPI.php
+++ b/src/Namespace/AbstractAPI.php
@@ -43,8 +43,23 @@ public function setWrapper(APIWrapper $wrapper): void
      */
     public function __call(string $name, array $arguments)
     {
-        if ($arguments && !isset($arguments[0])) {
-            $arguments = [$arguments];
+        if (!isset($arguments[0])) {
+            // Named arguments
+            $args = $arguments;
+            $aargs = [];
+        } else {
+            // Legacy arguments
+            $args = $arguments[0] ?? [];
+            $aargs = $arguments[1] ?? [];
+            if (!\array_is_list($arguments)
+                || \count($arguments) > 2
+                || !\is_array($args)
+                || !\is_array($aargs)
+                || isset($args['_'])
+                || (isset($args[0]) && !isset($aargs['multiple']))
+            ) {
+                throw new InvalidArgumentException('Parameter names must be provided!');
+            }
         }
 
         $name = $this->namespace.'.'.$name;
@@ -52,11 +67,6 @@ public function __call(string $name, array $arguments)
             throw new Exception(Blacklist::BLACKLIST[$name]);
         }
 
-        $aargs = isset($arguments[1]) && \is_array($arguments[1]) ? $arguments[1] : [];
-        $args = isset($arguments[0]) && \is_array($arguments[0]) ? $arguments[0] : [];
-        if (isset($args[0]) && !isset($args['multiple'])) {
-            throw new InvalidArgumentException('Parameter names must be provided!');
-        }
         return $this->wrapper->getAPI()->methodCallAsyncRead($name, $args, $aargs);
     }
 }