diff --git a/ctl/shared_ptr.h b/ctl/shared_ptr.h
index ed33a3a98..d3b7396ee 100644
--- a/ctl/shared_ptr.h
+++ b/ctl/shared_ptr.h
@@ -258,6 +258,9 @@ class shared_ptr
     {
     }
 
+    template <typename U, typename E>
+    friend class shared_ptr;
+
     template<typename U, typename... Args>
     friend shared_ptr<U> make_shared(Args&&... args);
 
diff --git a/test/ctl/shared_ptr_test.cc b/test/ctl/shared_ptr_test.cc
index 46d76504c..a3fc00359 100644
--- a/test/ctl/shared_ptr_test.cc
+++ b/test/ctl/shared_ptr_test.cc
@@ -62,15 +62,12 @@ main()
             return 5;
     }
 
-    // TODO(mrdomino):
-#if 0
     {
         Ptr<int> x(new int);
         Ptr<void> y(x, nullptr);
         if (x.use_count() != 2)
             return 7;
     }
-#endif
 
     {
         auto x = Mk<int>(5);