diff --git a/tools/gen-postmortem-metadata.py b/tools/gen-postmortem-metadata.py
index 102946b7b9..b668693401 100644
--- a/tools/gen-postmortem-metadata.py
+++ b/tools/gen-postmortem-metadata.py
@@ -259,6 +259,8 @@ extras_accessors = [
     'JSArrayBuffer, byte_length, size_t, kByteLengthOffset',
     'JSArrayBufferView, byte_length, size_t, kByteLengthOffset',
     'JSArrayBufferView, byte_offset, size_t, kByteOffsetOffset',
+    'JSDate, value, Object, kValueOffset',
+    'JSRegExp, source, Object, kSourceOffset',
     'JSTypedArray, external_pointer, uintptr_t, kExternalPointerOffset',
     'JSTypedArray, length, Object, kLengthOffset',
     'Map, instance_size_in_words, char, kInstanceSizeInWordsOffset',