diff --git a/src/hb-set-private.hh b/src/hb-set-private.hh
index c7f4aa088..ee489d034 100644
--- a/src/hb-set-private.hh
+++ b/src/hb-set-private.hh
@@ -38,6 +38,8 @@ struct _hb_set_t
   inline void init (void) {
     clear ();
   }
+  inline void fini (void) {
+  }
   inline void clear (void) {
     memset (elts, 0, sizeof elts);
   }
diff --git a/src/hb-set.cc b/src/hb-set.cc
index 3b1c5bdcb..0a0bc6138 100644
--- a/src/hb-set.cc
+++ b/src/hb-set.cc
@@ -67,6 +67,8 @@ hb_set_destroy (hb_set_t *set)
 {
   if (!hb_object_destroy (set)) return;
 
+  set->fini ();
+
   free (set);
 }