diff --git a/languages.toml b/languages.toml
index d05180ef1010d..e735735ba5b54 100644
--- a/languages.toml
+++ b/languages.toml
@@ -2698,6 +2698,7 @@ file-types = [ "cabal" ]
 roots = ["cabal.project", "Setup.hs"]
 indent = { tab-width = 2, unit = "  " }
 comment-token = "--"
+language-servers = [ "haskell-language-server" ]
 
 [[language]]
 name = "hurl"