diff --git a/src/Php/CompilerBase.php b/src/Php/CompilerBase.php
index 4eaded66..e07e9d53 100644
--- a/src/Php/CompilerBase.php
+++ b/src/Php/CompilerBase.php
@@ -1423,9 +1423,9 @@ class CompilerBase extends \PhpAot\Core\Translator
         $list  = [];
 
         $list[] = $this->getIndent() . $tmpVar . ' = ' . $this->parseExpr($next);
-        $right  = new Variable($tmpVar);
+        $rightVar  = new Variable($tmpVar);
         foreach ($chain as $var) {
-            $list[] = $this->getIndent() . $this->parseAssignFinally($var, $right);
+            $list[] = $this->getIndent() . $this->parseAssignFinally($var, $rightVar);
         }
 
         return implode(";\n" . $this->getIndent(), $list);
@@ -2349,7 +2349,7 @@ class CompilerBase extends \PhpAot\Core\Translator
         }
         $class = '';
         $type = $this->parseTypeDecl($param->type, self::DECL_TYPE_OF_PARAM, $class);
-        if ($class) {
+        if ($class and !$this->hasInterface($class) and !$this->isAbstractClass($class)) {
             $this->addObject($var, $class);
             $argInfo->class = $class;
         }
diff --git a/src/gen_stub.php b/src/gen_stub.php
index 66cb054b..30fb1f7a 100755
--- a/src/gen_stub.php
+++ b/src/gen_stub.php
@@ -4866,7 +4866,9 @@ function parseFunctionLike(
             }
 
             if ($param->default instanceof Expr\ClassConstFetch && $param->default->class->toLowerString() === "self") {
-                throw new Exception('The exact class name must be used instead of "self"');
+                $defaultValue = getTranslator()->getClassConstValue($func, $name->className->name, $param->default->name->name);
+            } else {
+                $defaultValue = $param->default ? $prettyPrinter->prettyPrintExpr($param->default) : null;
             }
 
             $foundVariadic = $param->variadic;
@@ -4877,7 +4879,7 @@ function parseFunctionLike(
                 $param->variadic,
                 $type,
                 isset($docParamTypes[$varName]) ? Type::fromString($docParamTypes[$varName]) : null,
-                $param->default ? $prettyPrinter->prettyPrintExpr($param->default) : null,
+                $defaultValue,
                 AttributeInfo::createFromGroups($param->attrGroups)
             );
             if (!$param->default && !$param->variadic) {
diff --git a/tests/aot/self-class/002.phpt b/tests/aot/self-class/002.phpt
new file mode 100644
index 00000000..ea2e814c
--- /dev/null
+++ b/tests/aot/self-class/002.phpt
@@ -0,0 +1,22 @@
+--TEST--
+self class
+--FILE--
+<?php
+class EvaluatedValue
+{
+   const TYPE = 'string';
+    public function run(string $value, string $type = self::TYPE)
+    {
+        var_dump($value);
+        var_dump($type);
+    }
+}
+
+function main() {
+    $obj = new EvaluatedValue;
+    $obj->run('null');
+}
+?>
+--EXPECT--
+string(4) "null"
+string(6) "string"
\ No newline at end of file