diff --git a/libweave/external/base/memory/ref_counted.h b/libweave/external/base/memory/ref_counted.h
index 45d988d..ee5f58b 100644
--- a/libweave/external/base/memory/ref_counted.h
+++ b/libweave/external/base/memory/ref_counted.h
@@ -19,7 +19,7 @@
 
 namespace subtle {
 
-class RefCountedBase {
+class BASE_EXPORT RefCountedBase {
  public:
   bool HasOneRef() const { return ref_count_ == 1; }
 
@@ -69,7 +69,7 @@
   DISALLOW_COPY_AND_ASSIGN(RefCountedBase);
 };
 
-class RefCountedThreadSafeBase {
+class BASE_EXPORT RefCountedThreadSafeBase {
  public:
   bool HasOneRef() const;
 
diff --git a/libweave/external/base/memory/weak_ptr.h b/libweave/external/base/memory/weak_ptr.h
index 1847773..e07beeb 100644
--- a/libweave/external/base/memory/weak_ptr.h
+++ b/libweave/external/base/memory/weak_ptr.h
@@ -78,7 +78,7 @@
 // These classes are part of the WeakPtr implementation.
 // DO NOT USE THESE CLASSES DIRECTLY YOURSELF.
 
-class WeakReference {
+class BASE_EXPORT WeakReference {
  public:
   // Although Flag is bound to a specific SequencedTaskRunner, it may be
   // deleted from another via base::WeakPtr::~WeakPtr().
@@ -107,7 +107,7 @@
   scoped_refptr<const Flag> flag_;
 };
 
-class WeakReferenceOwner {
+class BASE_EXPORT WeakReferenceOwner {
  public:
   WeakReferenceOwner();
   ~WeakReferenceOwner();
@@ -128,7 +128,7 @@
 // constructor by avoiding the need for a public accessor for ref_.  A
 // WeakPtr<T> cannot access the private members of WeakPtr<U>, so this
 // base class gives us a way to access ref_ in a protected fashion.
-class WeakPtrBase {
+class BASE_EXPORT WeakPtrBase {
  public:
   WeakPtrBase();
   ~WeakPtrBase();