diff --git a/src/hb-ot-color-cbdt-table.hh b/src/hb-ot-color-cbdt-table.hh
index d07c73dbd41af5b672201f423c2e6019979661a7..f744e1a6a27b8535e73553cbbda37730bf69deee 100644
--- a/src/hb-ot-color-cbdt-table.hh
+++ b/src/hb-ot-color-cbdt-table.hh
@@ -504,12 +504,12 @@ struct CBDT
       }
     }
 
-    inline hb_blob_t* reference_blob_for_glyph (hb_codepoint_t  glyph_id,
-						unsigned int    x_ppem,
-						unsigned int    y_ppem) const
+    inline hb_blob_t* reference_png (hb_codepoint_t  glyph_id,
+				     unsigned int    x_ppem,
+				     unsigned int    y_ppem) const
     {
       if (!cblc)
-	return hb_blob_get_empty ();  // Not a color bitmap font.
+	return hb_blob_get_empty ();
 
       if (x_ppem == 0) x_ppem = upem;
       if (y_ppem == 0) y_ppem = upem;
diff --git a/src/hb-ot-color.cc b/src/hb-ot-color.cc
index c70549bc3a96159032dc0eda35ff7e6b5e493a34..c89dc9e541354c1d94b5fd2c67fe0863556daca2 100644
--- a/src/hb-ot-color.cc
+++ b/src/hb-ot-color.cc
@@ -321,7 +321,7 @@ hb_ot_color_glyph_reference_png (hb_font_t *font, hb_codepoint_t  glyph)
     blob = _get_sbix (font->face).reference_png (font, glyph, nullptr, nullptr);
 
   if (hb_blob_get_length (blob) == 0 && _get_cbdt (font->face).has_data ())
-    blob = _get_cbdt (font->face).reference_blob_for_glyph (glyph, font->x_ppem, font->y_ppem);
+    blob = _get_cbdt (font->face).reference_png (glyph, font->x_ppem, font->y_ppem);
 
   return blob;
 }