diff --git a/runtime/syntax/asciidoc.vim b/runtime/syntax/asciidoc.vim
index ccb079e..29451f9 100644
--- a/runtime/syntax/asciidoc.vim
+++ b/runtime/syntax/asciidoc.vim
@@ -1,13 +1,15 @@
 " Vim syntax file
-" Language:     AsciiDoc
-" Author:       Stuart Rackham <srackham@gmail.com> (inspired by Felix
-"               Obenhuber's original asciidoc.vim script).
-" URL:          http://asciidoc.org/
-" Licence:      GPL (http://www.gnu.org)
-" Remarks:      Vim 6 or greater
-" Last Update:  2014 Aug 29 (see Issue 240)
+" Language:        AsciiDoc
+" Maintainer:      @aerostitch on GitHub (tag me in your issue in the
+"                  github/vim/vim repository and I'll answer when available)
+" Original author: Stuart Rackham <srackham@gmail.com> (inspired by Felix
+"                  Obenhuber's original asciidoc.vim script).
+" URL:             http://asciidoc.org/
+" Licence:         GPL (http://www.gnu.org)
+" Remarks:         Vim 6 or greater
+" Last Update:     2020 May 03 (see Issue 240)
 " Limitations:
-" 
+"
 " - Nested quoted text formatting is highlighted according to the outer
 "   format.
 " - If a closing Example Block delimiter may be mistaken for a title
@@ -23,9 +25,7 @@
   finish
 endif
 
-syn clear
-syn sync fromstart
-syn sync linebreaks=100
+" Use the default syntax syncing.
 
 " Run :help syn-priority to review syntax matching priority.
 syn keyword asciidocToDo TODO FIXME CHECK TEST XXX ZZZ DEPRECATED
diff --git a/runtime/syntax/make.vim b/runtime/syntax/make.vim
index 2a64dcd..d0d7f15 100644
--- a/runtime/syntax/make.vim
+++ b/runtime/syntax/make.vim
@@ -3,7 +3,7 @@
 " Maintainer:	Roland Hieber <rohieb+vim-iR0jGdkV@rohieb.name>, <https://github.com/rohieb>
 " Previous Maintainer:	Claudio Fleiner <claudio@fleiner.com>
 " URL:		https://github.com/vim/vim/blob/master/runtime/syntax/make.vim
-" Last Change:	2020 Mar 04
+" Last Change:	2020 May 03
 
 " quit when a syntax file was already loaded
 if exists("b:current_syntax")
@@ -73,7 +73,7 @@
 syn match makeInclude	"^ *[-s]\=include\s.*$"
 syn match makeStatement	"^ *vpath"
 syn match makeExport    "^ *\(export\|unexport\)\>"
-syn match makeOverride	"^ *override"
+syn match makeOverride	"^ *override\>"
 " Statements / Functions (GNU make)
 syn match makeStatement contained "(\(abspath\|addprefix\|addsuffix\|and\|basename\|call\|dir\|error\|eval\|file\|filter-out\|filter\|findstring\|firstword\|flavor\|foreach\|guile\|if\|info\|join\|lastword\|notdir\|or\|origin\|patsubst\|realpath\|shell\|sort\|strip\|subst\|suffix\|value\|warning\|wildcard\|word\|wordlist\|words\)\>"ms=s+1
 
diff --git a/runtime/syntax/masm.vim b/runtime/syntax/masm.vim
index bb3c968..abee78b 100644
--- a/runtime/syntax/masm.vim
+++ b/runtime/syntax/masm.vim
@@ -2,8 +2,7 @@
 " Language:	Microsoft Macro Assembler (80x86)
 " Orig Author:	Rob Brady <robb@datatone.com>
 " Maintainer:	Wu Yongwei <wuyongwei@gmail.com>
-" Last Change:	$Date: 2013/11/13 11:49:24 $
-" $Revision: 1.48 $
+" Last Change:	2020-05-07 17:04:10 +0800
 
 " Quit when a syntax file was already loaded
 if exists("b:current_syntax")
@@ -13,10 +12,12 @@
 let s:cpo_save = &cpo
 set cpo&vim
 
+setlocal iskeyword=@,48-57,_,36,60,62,63,@-@
+
 syn case ignore
 
 
-syn match masmIdentifier	"[@a-z_$?][@a-z0-9_$?]*"
+syn match masmIdentifier	"[@a-z_$?][@a-z0-9_$?<>]*"
 syn match masmLabel		"^\s*[@a-z_$?][@a-z0-9_$?]*:"he=e-1
 
 syn match masmDecimal		"[-+]\?\d\+[dt]\?"