diff --git a/src/llv8-constants.cc b/src/llv8-constants.cc
index 6e86a3b0..9c68b78f 100644
--- a/src/llv8-constants.cc
+++ b/src/llv8-constants.cc
@@ -501,7 +501,7 @@ void DescriptorArray::Load() {
   kFirstIndex = LoadOptionalConstant({"prop_idx_first"}, 0);
   kSize = LoadConstant({"prop_desc_size"});
   kHeaderSize = LoadOptionalConstant(
-      {"class_DescriptorArray__header_size__uintptr_t"}, 0);
+      {"class_DescriptorArray__header_size__uintptr_t"}, 24);
 }
 
 
diff --git a/src/llv8-inl.h b/src/llv8-inl.h
index ad93e978..0293eb86 100644
--- a/src/llv8-inl.h
+++ b/src/llv8-inl.h
@@ -889,7 +889,7 @@ inline T DescriptorArray::Get(int index, int64_t offset) {
   if (v8()->descriptor_array()->kFirstIndex.Loaded()) {
     return FixedArray::Get<T>(
         *(v8()->descriptor_array()->kFirstIndex) + index + offset, err);
-  } else if (v8()->descriptor_array()->kHeaderSize.Loaded()) {
+  } else if (v8()->descriptor_array()->kHeaderSize.Check()) {
     index *= v8()->common()->kPointerSize;
     index += *(v8()->descriptor_array()->kHeaderSize);
     index += (v8()->common()->kPointerSize * offset);