From 7dce0a27f6abfe59066e71c7ab0f175fc0ec08b9 Mon Sep 17 00:00:00 2001
From: Calixte Denizet <calixte.denizet@gmail.com>
Date: Wed, 24 May 2023 14:35:19 +0200
Subject: [PATCH] Avoid to have a null fallback if none has been provided

---
 src/core/font_substitutions.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/core/font_substitutions.js b/src/core/font_substitutions.js
index faf85baa3..85fae2e10 100644
--- a/src/core/font_substitutions.js
+++ b/src/core/font_substitutions.js
@@ -465,10 +465,12 @@ function getFontSubstitution(
     src.push(`local(${baseFontName})`);
   }
   const { style, ultimate } = generateFont(substitution, src, localFontPath);
+  const guessFallback = ultimate === null;
+  const fallback = guessFallback ? "" : `,${ultimate}`;
 
   substitutionInfo = {
-    css: `${loadedName},${ultimate}`,
-    guessFallback: false,
+    css: `${loadedName}${fallback}`,
+    guessFallback,
     loadedName,
     baseFontName,
     src: src.join(","),