diff --git a/after/syntax/tex.vim b/after/syntax/tex.vim
index f3abb07f37..006ad4db53 100644
--- a/after/syntax/tex.vim
+++ b/after/syntax/tex.vim
@@ -372,6 +372,7 @@ call TexNewMathZone('I', 'gather', 1)
 call TexNewMathZone('J', 'multline', 1)
 call TexNewMathZone('K', 'xalignat', 1)
 call TexNewMathZone('L', 'xxalignat', 0)
+call TexNewMathZone('M', 'mathpar', 1)
 
 execute 'syntax match texBadMath ''\\end\s*{\s*\(' . join([
       \ 'align',