diff --git a/SOURCES/cantarell-fontconfig.conf b/SOURCES/cantarell-fontconfig.conf
new file mode 100644
index 0000000..bc9f574
--- /dev/null
+++ b/SOURCES/cantarell-fontconfig.conf
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE fontconfig SYSTEM "../fonts.dtd">
+<!--
+
+     Define aliasing and other fontconfig settings for Cantarell.
+
+-->
+<fontconfig>
+  <!-- Font substitution -->
+  <alias binding="same">
+    <family>system-ui</family>
+    <accept>
+      <family>Cantarell</family>
+    </accept>
+  </alias>
+
+  <!-- Generic name assignment -->
+  <alias>
+    <family>Cantarell</family>
+    <default>
+      <family>system-ui</family>
+    </default>
+  </alias>
+
+  <match target="pattern">
+    <test qual="any" name="family">
+      <string>Cantarell</string>
+    </test>
+    <edit name="family" mode="assign" binding="weak">
+      <string>Cantarell</string>
+    </edit>
+  </match>
+</fontconfig>
diff --git a/SPECS/abattis-cantarell-fonts.spec b/SPECS/abattis-cantarell-fonts.spec
index ccd7d13..d1b5aaa 100644
--- a/SPECS/abattis-cantarell-fonts.spec
+++ b/SPECS/abattis-cantarell-fonts.spec
@@ -8,7 +8,7 @@
 
 Name: %{fontname}-fonts
 Version: 0.0.25
-Release: 4%{?dist}
+Release: 6%{?dist}
 Summary: Cantarell, a Humanist sans-serif font family
 
 Group: User Interface/X
@@ -16,6 +16,7 @@ License: OFL
 URL: https://git.gnome.org/browse/cantarell-fonts/
 Source0: http://download.gnome.org/sources/%{actualname}-fonts/0.0/%{actualname}-fonts-%{version}.tar.xz
 Source1: %{fontname}.metainfo.xml
+Source2: cantarell-fontconfig.conf
 
 BuildArch: noarch
 BuildRequires: fontpackages-devel
@@ -40,7 +41,7 @@ install -m 0755 -d %{buildroot}%{_fontdir}
 install -m 0644 -p otf/*.otf %{buildroot}%{_fontdir}
 install -m 0755 -d %{buildroot}%{_fontconfig_templatedir} \
                    %{buildroot}%{_fontconfig_confdir}
-install -m 0644 -p fontconfig/%{fontconf} \
+install -m 0644 -p %{SOURCE2} \
         %{buildroot}%{_fontconfig_templatedir}/%{fontconf}
 ln -s %{_fontconfig_templatedir}/%{fontconf} \
       %{buildroot}%{_fontconfig_confdir}/%{fontconf}
@@ -55,6 +56,11 @@ install -Dm 0644 -p %{SOURCE1} \
 %{_datadir}/appdata/%{fontname}.metainfo.xml
 
 %changelog
+* Wed Dec 23 2020 Akira TAGOH <tagoh@redhat.com> - 0.0.25-6
+- Backport fontconfig config file from Fedora.
+- Add System UI generic family alias
+  Resolves: rhbz#1865788
+
 * Wed Feb 07 2018 Fedora Release Engineering <releng@fedoraproject.org> - 0.0.25-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild