diff --git a/src/heap/slot-set.h b/src/heap/slot-set.h
index c6fb34b..908e0fa 100644
--- a/src/heap/slot-set.h
+++ b/src/heap/slot-set.h
@@ -399,13 +399,13 @@
 // encoded (slot type, slot offset) pairs.
 // There is no duplicate detection and we do not expect many duplicates because
 // typed slots contain V8 internal pointers that are not directly exposed to JS.
-class TypedSlots {
+class V8_EXPORT_PRIVATE TypedSlots {
  public:
   static const int kMaxOffset = 1 << 29;
   TypedSlots() = default;
   virtual ~TypedSlots();
-  V8_EXPORT_PRIVATE void Insert(SlotType type, uint32_t offset);
-  V8_EXPORT_PRIVATE void Merge(TypedSlots* other);
+  void Insert(SlotType type, uint32_t offset);
+  void Merge(TypedSlots* other);
 
  protected:
   class OffsetField : public BitField<int, 0, 29> {};
diff --git a/src/objects/smi.h b/src/objects/smi.h
index 422599a..a1e6cb1 100644
--- a/src/objects/smi.h
+++ b/src/objects/smi.h
@@ -98,7 +98,7 @@
   // C++ does not allow us to have an object of type Smi within class Smi,
   // so the kZero value has type ObjectPtr. Consider it deprecated; new code
   // should use zero() instead.
-  static constexpr ObjectPtr kZero = ObjectPtr(0);
+  V8_EXPORT_PRIVATE static constexpr ObjectPtr kZero = ObjectPtr(0);
   // If you need something with type Smi, call zero() instead. Since it is
   // a constexpr, "calling" it is just as efficient as reading kZero.
   static inline constexpr Smi zero() { return Smi::FromInt(0); }