diff --git a/src/test-map.cc b/src/test-map.cc
index 65f11243f..c4fdf45c1 100644
--- a/src/test-map.cc
+++ b/src/test-map.cc
@@ -189,14 +189,12 @@ main (int argc, char **argv)
 
   /* Test hb::shared_ptr. */
   hb_hash (hb::shared_ptr<hb_set_t> ());
-#if 0
   {
-    hb_hashmap_t<hb::shared_ptr<hb_set_t>, hb::shared_ptr<hb_set_t>, std::nullptr_t, std::nullptr_t, nullptr, nullptr> m;
+    hb_hashmap_t<hb::shared_ptr<hb_set_t>, hb::shared_ptr<hb_set_t>> m;
 
     m.get (hb::shared_ptr<hb_set_t> ());
     m.get (hb::shared_ptr<hb_set_t> (hb_set_get_empty ()));
   }
-#endif
 
   return 0;
 }