diff --git a/pkgs/development/libraries/tdlib/default.nix b/pkgs/development/libraries/tdlib/default.nix
index f430b10c64c0..165506f96472 100644
--- a/pkgs/development/libraries/tdlib/default.nix
+++ b/pkgs/development/libraries/tdlib/default.nix
@@ -1,18 +1,18 @@
 { fetchFromGitHub, gperf, openssl, readline, zlib, cmake, stdenv }:
 
 stdenv.mkDerivation rec {
-  version = "1.6.9";
+  version = "unstable-2020-10-25";
   pname = "tdlib";
 
   src = fetchFromGitHub {
     owner = "tdlib";
     repo = "td";
 
-    # At version 1.6.0, this line was `rev = "v${version}". Version 1.6.9 uses an explicit revision because 1.6.9 is not
-    # a tdlib GitHub release, and is therefore not hosted at `https://github.com/tdlib/td/releases/tag/v1.6.9`. Please
-    # return to the `rev = "v${version}"` style on the next version bump if you can, since that will allow
-    # `nixpkgs-update` to update the package automatically.
-    rev = "unstable-2020-10-25";
+    # At version 1.6.0, this line was `rev = "v${version}". Version 1.6.9 (here called `unstable-2020-10-25`) uses an
+    # explicit revision because 1.6.9 is not a tdlib GitHub release, and is therefore not hosted at
+    # `https://github.com/tdlib/td/releases/tag/v1.6.9`. Please return to the `rev = "v${version}"` style on the next
+    # version bump if you can, since that will allow `nixpkgs-update` to update the package automatically.
+    rev = "32f2338bd199dd06a1b4b5f1ad14f2d4f2868f01";
 
     sha256 = "0wv03hlgzrsc04kcwnwz6dsmkdzvhb0i1wjs08gzivwxw06pkq4n";
   };