1 files changed, 2 insertions, 0 deletions
diff --git a/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix b/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
index 39d664805fa9..e1ced2df9f37 100644
--- a/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
+++ b/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
@@ -14,5 +14,7 @@ in {
   stable = mkTelegram stableVersion;
   preview = mkTelegram (stableVersion // {
     stable = false;
+    version = "1.3.12";
+    sha256Hash = "00z4ljs4fvbk7sf8wv1v50kln26gv8q12x6q41ai9gfzkvq5f69a";
   });
 }