diff --git a/src/OT/glyf/SubsetGlyph.hh b/src/OT/glyf/SubsetGlyph.hh
index 88fc93c43..1a0370c75 100644
--- a/src/OT/glyf/SubsetGlyph.hh
+++ b/src/OT/glyf/SubsetGlyph.hh
@@ -21,10 +21,18 @@ struct SubsetGlyph
 
   bool serialize (hb_serialize_context_t *c,
 		  bool use_short_loca,
-		  const hb_subset_plan_t *plan) const
+		  const hb_subset_plan_t *plan,
+		  hb_font_t *font)
   {
     TRACE_SERIALIZE (this);
 
+    if (font)
+    {
+      const OT::glyf_accelerator_t &glyf = *font->face->table.glyf;
+      if (!this->compile_bytes_with_deltas (plan, font, glyf))
+        return_trace (false);
+    }
+
     hb_bytes_t dest_glyph = dest_start.copy (c);
     dest_glyph = hb_bytes_t (&dest_glyph, dest_glyph.length + dest_end.copy (c).length);
     unsigned int pad_length = use_short_loca ? padding () : 0;
diff --git a/src/OT/glyf/glyf.hh b/src/OT/glyf/glyf.hh
index 0c79c914f..fe2f1d7ad 100644
--- a/src/OT/glyf/glyf.hh
+++ b/src/OT/glyf/glyf.hh
@@ -42,11 +42,15 @@ struct glyf
   bool serialize (hb_serialize_context_t *c,
 		  Iterator it,
                   bool use_short_loca,
-		  const hb_subset_plan_t *plan)
+		  const hb_subset_plan_t *plan,
+		  hb_font_t *font)
   {
     TRACE_SERIALIZE (this);
+
     unsigned init_len = c->length ();
-    for (const auto &_ : it) _.serialize (c, use_short_loca, plan);
+    for (auto &_ : it)
+      if (unlikely (!_.serialize (c, use_short_loca, plan, font)))
+        return false;
 
     /* As a special case when all glyph in the font are empty, add a zero byte
      * to the table, so that OTS doesn’t reject it, and to make the table work
@@ -74,10 +78,11 @@ struct glyf
     hb_vector_t<glyf_impl::SubsetGlyph> glyphs;
     _populate_subset_glyphs (c->plan, glyphs);
 
+    hb_font_t *font = nullptr;
     if (!c->plan->pinned_at_default)
     {
-      if (!_compile_subset_glyphs_with_deltas (c->plan, &glyphs))
-        return_trace (false);
+      font = _create_font_for_instancing (c->plan);
+      if (unlikely (!font)) return false;
     }
 
     auto padded_offsets =
@@ -89,7 +94,7 @@ struct glyf
     bool use_short_loca = max_offset < 0x1FFFF;
 
 
-    glyf_prime->serialize (c->serializer, hb_iter (glyphs), use_short_loca, c->plan);
+    glyf_prime->serialize (c->serializer, glyphs.writer (), use_short_loca, c->plan, font);
     if (!use_short_loca) {
       padded_offsets =
           + hb_iter (glyphs)
@@ -97,13 +102,15 @@ struct glyf
           ;
     }
 
-
-    if (!c->plan->pinned_at_default)
+    if (font)
       _free_compiled_subset_glyphs (&glyphs);
+
     if (unlikely (c->serializer->in_error ())) return_trace (false);
     return_trace (c->serializer->check_success (glyf_impl::_add_loca_and_head (c->plan,
 									       padded_offsets,
 									       use_short_loca)));
+
+    hb_font_destroy (font);
   }
 
   void
@@ -113,10 +120,6 @@ struct glyf
   hb_font_t *
   _create_font_for_instancing (const hb_subset_plan_t *plan) const;
 
-  bool
-  _compile_subset_glyphs_with_deltas (const hb_subset_plan_t *plan,
-                                      hb_vector_t<glyf_impl::SubsetGlyph> *glyphs /* OUT */) const;
-
   void _free_compiled_subset_glyphs (hb_vector_t<glyf_impl::SubsetGlyph> *glyphs) const
   {
     for (auto _ : *glyphs)
@@ -432,27 +435,6 @@ glyf::_create_font_for_instancing (const hb_subset_plan_t *plan) const
   return font;
 }
 
-inline bool
-glyf::_compile_subset_glyphs_with_deltas (const hb_subset_plan_t *plan,
-                                          hb_vector_t<glyf_impl::SubsetGlyph> *glyphs /* OUT */) const
-{
-  hb_font_t *font = _create_font_for_instancing (plan);
-  if (unlikely (!font)) return false;
-
-  const OT::glyf_accelerator_t &glyf = *plan->source->table.glyf;
-  for (auto& subset_glyph : *glyphs)
-  {
-    if (!const_cast<glyf_impl::SubsetGlyph &> (subset_glyph).compile_bytes_with_deltas (plan, font, glyf))
-    {
-      hb_font_destroy (font);
-      return false;
-    }
-  }
-
-  hb_font_destroy (font);
-  return true;
-}
-
 
 } /* namespace OT */