From 8261ca6153a576cb5c8c0d8b621d435b266e3c62 Mon Sep 17 00:00:00 2001
From: Frederik Berlaen <frederik@typemytype.com>
Date: Thu, 10 Nov 2022 08:42:23 +0100
Subject: [PATCH] using the fontTools ufoLib DEFAULT_LAYER_NAME

---
 Lib/fontParts/base/font.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Lib/fontParts/base/font.py b/Lib/fontParts/base/font.py
index c34f8909..ea36b63c 100644
--- a/Lib/fontParts/base/font.py
+++ b/Lib/fontParts/base/font.py
@@ -1,4 +1,5 @@
 import os
+from fontTools import ufoLib
 from fontParts.base.errors import FontPartsError
 from fontParts.base.base import dynamicProperty, InterpolationMixin
 from fontParts.base.layer import _BaseGlyphVendor
@@ -1454,8 +1455,8 @@ def _interpolate(self, factor, minFont, maxFont,
             dstLayer.interpolate(factor, minLayer, maxLayer,
                                  round=round, suppressError=suppressError)
         if self.layerOrder:
-            if "public.default" in self.layerOrder:
-                self.defaultLayer = self.getLayer("public.default")
+            if ufoLib.DEFAULT_LAYER_NAME in self.layerOrder:
+                self.defaultLayer = self.getLayer(ufoLib.DEFAULT_LAYER_NAME)
             else:
                 self.defaultLayer = self.getLayer(self.layerOrder[0])
         # kerning and groups