diff --git a/NEWS b/NEWS
index 4cbdc20c2a..561b63c447 100644
--- a/NEWS
+++ b/NEWS
@@ -122,7 +122,9 @@ with all sufficient information, see the ChangeLog file.
 * RubyVM::InstructionSequence
   * add the following methods as a primitive tool of iseq loader.
     See sample/iseq_loader.rb for usage.
-    [Feature #11788] (experimental feature)
+    Note that loader does not have verifier so it is easy to cause
+    critical problem by loading modified/broken binary data.
+    See [Feature #11788] for more details. (experimental feature)
     * RubyVM::InstructionSequence#to_binary_format(extra_data = nil)
     * RubyVM::InstructionSequence.from_binary_format(binary)
     * RubyVM::InstructionSequence.from_binary_format_extra_data(binary)