diff --git a/lisp/progmodes/eglot.el b/lisp/progmodes/eglot.el
index 9eb28e34faf..45e0e7d16cd 100644
--- a/lisp/progmodes/eglot.el
+++ b/lisp/progmodes/eglot.el
@@ -327,6 +327,7 @@ automatically)."
     ((csharp-mode csharp-ts-mode)
      . ,(eglot-alternatives
          '(("omnisharp" "-lsp")
+           ("OmniSharp" "-lsp")
            ("csharp-ls"))))
     (purescript-mode . ("purescript-language-server" "--stdio"))
     ((perl-mode cperl-mode)