diff --git a/src/heap/memory-chunk-layout.h b/src/heap/memory-chunk-layout.h
index 2e1d0e52bb..2b7eedd595 100644
--- a/src/heap/memory-chunk-layout.h
+++ b/src/heap/memory-chunk-layout.h
@@ -73,6 +73,9 @@ class V8_EXPORT_PRIVATE MemoryChunkLayout {
     FIELD(ObjectStartBitmap, ObjectStartBitmap),
 #endif  // V8_ENABLE_INNER_POINTER_RESOLUTION_OSB
     FIELD(size_t, WasUsedForAllocation),
+#if defined(_MSC_VER) && defined(_M_IX86)
+    kPaddingOffset = kWasUsedForAllocationEnd + 4,
+#endif
     kMarkingBitmapOffset,
     kMemoryChunkHeaderSize = kMarkingBitmapOffset,
     kMemoryChunkHeaderStart = kSlotSetOffset,