diff --git a/pkgs/development/libraries/mbedtls/default.nix b/pkgs/development/libraries/mbedtls/default.nix
index 4d833bb1848f..603b9be610a1 100644
--- a/pkgs/development/libraries/mbedtls/default.nix
+++ b/pkgs/development/libraries/mbedtls/default.nix
@@ -12,7 +12,7 @@
 stdenv.mkDerivation rec {
   pname = "mbedtls";
   name = "mbedtls-${version}";
-  version = "2.16.3";
+  version = "2.16.3"; # nixpkgs-update: no auto update
 
   src = fetchFromGitHub {
     owner = "ARMmbed";