diff --git a/src/hb-ot-color-colr-table.hh b/src/hb-ot-color-colr-table.hh
index 7d79d575a..9354f533a 100644
--- a/src/hb-ot-color-colr-table.hh
+++ b/src/hb-ot-color-colr-table.hh
@@ -214,10 +214,9 @@ struct COLR
 				if (unlikely (!old_record))
 				  return hb_pair_t<bool, BaseGlyphRecord> (false, Null (BaseGlyphRecord));
 
-				BaseGlyphRecord new_record;
+				BaseGlyphRecord new_record = {0};
 				new_record.glyphId = new_gid;
 				new_record.numLayers = old_record->numLayers;
-				new_record.firstLayerIdx = 0; // Updated during serialization.
 				return hb_pair_t<bool, BaseGlyphRecord> (true, new_record);
 			      })
     | hb_filter (hb_first)