diff --git a/misc/filehighlight.ini b/misc/filehighlight.ini
index 13dd71962..7e1a6f5ae 100644
--- a/misc/filehighlight.ini
+++ b/misc/filehighlight.ini
@@ -28,7 +28,7 @@
     extensions=7z;Z;ace;apk;arc;arj;ark;bz2;cab;cpio;deb;gz;lha;lz;lz4;lzh;lzma;rar;rpm;tar;tbz;tbz2;tgz;tlz;txz;tzst;xz;zip;zoo;zst
 
 [doc]
-    extensions=chm;css;ctl;diz;doc;docm;docx;dtd;fodg;fodp;fods;fodt;htm;html;json;letter;lsm;mail;man;markdown;md;me;msg;nroff;odg;odp;ods;odt;pdf;po;ppt;pptm;pptx;ps;rtf;sgml;shtml;tex;text;txt;xls;xlsm;xlsx;xml;xsd;xslt
+    extensions=chm;css;ctl;diz;doc;docm;docx;dtd;fodg;fodp;fods;fodt;htm;html;json;letter;lsm;mail;man;markdown;md;me;mkd;msg;nroff;odg;odp;ods;odt;pdf;po;ppt;pptm;pptx;ps;rtf;sgml;shtml;tex;text;txt;xls;xlsm;xlsx;xml;xsd;xslt
 
 [source]
     extensions=ada;asm;awk;bash;c;c++;caml;cc;cgi;cpp;cxx;diff;erl;go;h;h++;hh;hi;hpp;hs;inc;jasm;jav;java;js;m4;mak;mjs;ml;mli;mll;mlp;mly;pas;patch;php;phps;pl;pm;prg;py;rb;s;sas;sh;sl;st;swift;tcl;tk;xq