diff --git a/src/gen_stub.php b/src/gen_stub.php
index 3565b900..5e82c458 100755
--- a/src/gen_stub.php
+++ b/src/gen_stub.php
@@ -4930,6 +4930,9 @@ function parseFunctionLike(
 
             if ($param->default instanceof Expr\ClassConstFetch && $param->default->class->toLowerString() === "self") {
                 $defaultValue = getTranslator()->getClassConstValue($func, $name->className->name, $param->default->name->name);
+                if (!is_string($defaultValue)) {
+                    $defaultValue = var_export($defaultValue, true);
+                }
             } else {
                 $defaultValue = $param->default ? $prettyPrinter->prettyPrintExpr($param->default) : null;
             }
diff --git a/tests/aot/const/004.phpt b/tests/aot/const/004.phpt
new file mode 100644
index 00000000..9686ee43
--- /dev/null
+++ b/tests/aot/const/004.phpt
@@ -0,0 +1,33 @@
+--TEST--
+class const default value from self::CV
+--FILE--
+<?php
+class Test
+{
+    const CV = 1;
+
+    public static function aaa(int $v = self::CV): void
+    {
+        var_dump($v);
+    }
+
+    public function bbb(int $v = self::CV): void
+    {
+        var_dump($v);
+    }
+}
+
+function main(): void
+{
+    Test::aaa();
+    Test::aaa(999);
+    $t = new Test();
+    $t->bbb();
+    $t->bbb(888);
+}
+?>
+--EXPECT--
+int(1)
+int(999)
+int(1)
+int(888)