diff --git a/runtime/lua/vim/filetype.lua b/runtime/lua/vim/filetype.lua
index 846a76ab19..fd8b905175 100644
--- a/runtime/lua/vim/filetype.lua
+++ b/runtime/lua/vim/filetype.lua
@@ -2060,6 +2060,7 @@ local pattern = {
     ['/etc/DIR_COLORS$'] = 'dircolors',
     ['/etc/dnsmasq%.conf$'] = 'dnsmasq',
     ['/etc/dnsmasq%.d/'] = starsetf('dnsmasq'),
+    ['/etc/wireguard/.*%.conf$'] = 'dosini',
     ['/etc/yum%.conf$'] = 'dosini',
     ['/etc/yum%.repos%.d/'] = starsetf('dosini'),
     ['/etc/gitconfig%.d/'] = starsetf('gitconfig'),
diff --git a/test/old/testdir/test_filetype.vim b/test/old/testdir/test_filetype.vim
index 59f5ea2139..5577337391 100644
--- a/test/old/testdir/test_filetype.vim
+++ b/test/old/testdir/test_filetype.vim
@@ -256,6 +256,7 @@ func s:GetFilenameChecks() abort
     \            'psprint.conf', 'sofficerc', 'any/.config/lxqt/globalkeyshortcuts.conf', 'any/.config/screengrab/screengrab.conf',
     \            'any/.local/share/flatpak/repo/config',
     \            '.alsoftrc', 'alsoft.conf', 'alsoft.ini', 'alsoftrc.sample',
+    \            '/etc/wireguard/wg0.conf',
     \            '.notmuch-config', '.notmuch-config.myprofile',
     \            '~/.config/notmuch/myprofile/config'] + s:WhenConfigHome('$XDG_CONFIG_HOME/notmuch/myprofile/config'),
     \ 'dot': ['file.dot', 'file.gv'],