diff --git a/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix b/pkgs/applications/networking/instant-messengers/telegram/tdesktop/default.nix
index 6028e732c8f..b770acb37b3 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 = "1.5.17";
+    sha256Hash = "092p83s2h3rfc3vvhv1hnp08gph6y6r5b4j0vshw3z2v7lhwpzyf";
   });
 }