diff --git a/src/hb-algs.hh b/src/hb-algs.hh
index 02c5a8697..34e512e7e 100644
--- a/src/hb-algs.hh
+++ b/src/hb-algs.hh
@@ -245,7 +245,7 @@ struct
   template <typename T> constexpr uint32_t
   impl (const hb::shared_ptr<T>& v, hb_priority<1>) const
   {
-    return (uint32_t) (intptr_t) v.get ()->hash ();
+    return v.get () ? v.get ()->hash () : 0;
   }
 
   template <typename T> constexpr auto