diff --git a/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix b/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
index 03a99aea4001..1e8080fd9c9d 100644
--- a/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
+++ b/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
@@ -13,6 +13,8 @@ let
 in {
   stable = mkTelegram stableVersion;
   preview = mkTelegram (stableVersion // {
+    version = "1.4.4";
+    sha256Hash = "1m1j485r3vzpglzfn8l4cqskysvkx8l3pqaw3fgp66jfajbxynf0";
     stable = false;
   });
 }