diff --git a/runtime/syntax/tex.vim b/runtime/syntax/tex.vim
index 109ce61b78..ec9d90510d 100644
--- a/runtime/syntax/tex.vim
+++ b/runtime/syntax/tex.vim
@@ -7,6 +7,7 @@
 "   2025 Jan 18 by Vim Project: add texEmphStyle to texMatchGroup, #16228
 "   2025 Feb 08 by Vim Project: improve macro option, \providecommand, 
 "                               \newcommand and \newenvironment #16543
+"   2025 Sep 29 by Vim Project: add amsmath support #18433
 " Version:	121
 " Former URL:	http://www.drchip.org/astronaut/vim/index.html#SYNTAX_TEX
 "
@@ -443,7 +444,7 @@ endif
 " Bad Math (mismatched): {{{1
 if !exists("g:tex_no_math") && !s:tex_no_error
  syn match texBadMath		"\\end\s*{\s*\(array\|[bBpvV]matrix\|split\|smallmatrix\)\s*}"
- syn match texBadMath		"\\end\s*{\s*\(displaymath\|equation\|eqnarray\|math\)\*\=\s*}"
+ syn match texBadMath		"\\end\s*{\s*\(align\|alignat\|displaymath\|eqnarray\|equation\|flalign\|gather\|math\|multline\)\*\=\s*}"
  syn match texBadMath		"\\[\])]"
  syn match texBadPar	contained  "\%(\\par\>\|^\s*\n.\)"
 endif
@@ -487,6 +488,11 @@ if !exists("g:tex_no_math")
  call TexNewMathZone("B","eqnarray",1)
  call TexNewMathZone("C","equation",1)
  call TexNewMathZone("D","math",1)
+ call TexNewMathZone("E","align",1)
+ call TexNewMathZone("F","alignat",1)
+ call TexNewMathZone("G","flalign",1)
+ call TexNewMathZone("H","gather",1)
+ call TexNewMathZone("I","multline",1)
 
  " Inline Math Zones: {{{2
  if s:tex_fast =~# 'M'