diff --git a/src/hb-open-type.hh b/src/hb-open-type.hh
index 297edf08e..ace59f244 100644
--- a/src/hb-open-type.hh
+++ b/src/hb-open-type.hh
@@ -861,6 +861,7 @@ struct ArrayOfM1
   {
     TRACE_SANITIZE (this);
     if (unlikely (!sanitize_shallow (c))) return_trace (false);
+    if (!sizeof... (Ts) && hb_is_trivially_copyable (Type)) return_trace (true);
     unsigned int count = lenM1 + 1;
     for (unsigned int i = 0; i < count; i++)
       if (unlikely (!c->dispatch (arrayZ[i], hb_forward<Ts> (ds)...)))