diff --git a/languages.toml b/languages.toml
index b0b6a7b4..f9a6ad13 100644
--- a/languages.toml
+++ b/languages.toml
@@ -1404,6 +1404,7 @@ file-types = ["tex", "dtx", "ins", "sty", "cls", "Rd", "bbx", "cbx"]
 comment-token = "%"
 language-servers = [ "texlab" ]
 indent = { tab-width = 4, unit = "\t" }
+formatter = { command = "tex-fmt", args = ["--stdin"] }
 
 [[grammar]]
 name = "latex"