diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 6f7c6b4..390bc9c 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -337,6 +337,8 @@
     \ 'markdown': ['file.markdown', 'file.mdown', 'file.mkd', 'file.mkdn', 'file.mdwn', 'file.md'],
     \ 'mason': ['file.mason', 'file.mhtml', 'file.comp'],
     \ 'master': ['file.mas', 'file.master'],
+    \ 'maxima': ['file.mc', 'file.demo', 'file.dem', 'file.dmt', 'file.dm1', 'file.dm2', 'file.dm3',
+    \            'file.wxm', 'maxima-init.mac'],
     \ 'mel': ['file.mel'],
     \ 'meson': ['meson.build', 'meson_options.txt'],
     \ 'messages': ['/log/auth', '/log/cron', '/log/daemon', '/log/debug', '/log/kern', '/log/lpr', '/log/mail', '/log/messages', '/log/news/news', '/log/syslog', '/log/user',
diff --git a/src/version.c b/src/version.c
index fd46122..eb05f88 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4781,
+/**/
     4780,
 /**/
     4779,