diff --git a/Libraries/LibIDL/IDLParser.cpp b/Libraries/LibIDL/IDLParser.cpp
index 256872f2cd5..4f76b867896 100644
--- a/Libraries/LibIDL/IDLParser.cpp
+++ b/Libraries/LibIDL/IDLParser.cpp
@@ -505,7 +505,9 @@ void Parser::parse_stringifier(HashMap<ByteString, ByteString>& extended_attribu
     if (lexer.next_is("attribute"sv) || lexer.next_is("inherit"sv) || lexer.next_is("readonly"sv)) {
         parse_attribute(extended_attributes, interface);
         interface.stringifier_attribute = interface.attributes.last();
+        interface.stringifier_extended_attributes = interface.stringifier_attribute->extended_attributes;
     } else {
+        interface.stringifier_extended_attributes = move(extended_attributes);
         assert_specific(';');
     }
 }
diff --git a/Libraries/LibIDL/Types.h b/Libraries/LibIDL/Types.h
index 4f37908b28c..8249219cad6 100644
--- a/Libraries/LibIDL/Types.h
+++ b/Libraries/LibIDL/Types.h
@@ -280,6 +280,7 @@ public:
     Vector<Function> functions;
     Vector<Function> static_functions;
     bool has_stringifier { false };
+    Optional<HashMap<ByteString, ByteString>> stringifier_extended_attributes;
     Optional<Attribute> stringifier_attribute;
     bool has_unscopable_member { false };