diff --git a/bootstraptest/test_method.rb b/bootstraptest/test_method.rb
index f6f04541d6..41823b5007 100644
--- a/bootstraptest/test_method.rb
+++ b/bootstraptest/test_method.rb
@@ -1395,3 +1395,27 @@ assert_equal 'ok', %q{
   no_args
   splat_args
 }
+
+assert_equal 'ok', %q{
+  class A
+    private
+    def foo = "ng"
+  end
+
+  class B
+    def initialize(o)
+      @o = o
+    end
+
+    def foo(...) = @o.foo(...)
+    def internal_foo = foo
+  end
+
+  b = B.new(A.new)
+
+  begin
+    b.internal_foo
+  rescue NoMethodError
+    "ok"
+  end
+}
diff --git a/vm_args.c b/vm_args.c
index bb3992cbbc..1303243fd3 100644
--- a/vm_args.c
+++ b/vm_args.c
@@ -1177,7 +1177,8 @@ vm_caller_setup_fwd_args(const rb_execution_context_t *ec, rb_control_frame_t *r
 
     *adjusted_ci = VM_CI_ON_STACK(
             site_mid,
-            ((caller_flag & ~VM_CALL_ARGS_SIMPLE) | (site_flag & (VM_CALL_FCALL | VM_CALL_FORWARDING))),
+            ((caller_flag & ~(VM_CALL_ARGS_SIMPLE | VM_CALL_FCALL)) |
+             (site_flag & (VM_CALL_FCALL | VM_CALL_FORWARDING))),
             site_argc + caller_argc,
             kw
             );