diff --git a/pkgs/development/libraries/libav/default.nix b/pkgs/development/libraries/libav/default.nix
index 37ebf972e02..7bf969b78da 100644
--- a/pkgs/development/libraries/libav/default.nix
+++ b/pkgs/development/libraries/libav/default.nix
@@ -28,6 +28,7 @@ let
   result = {
     libav_0_8 = libavFun "0.8.19" "c79350d6fa071fcd66448ffc713fe3b9754876a8";
     libav_11  = libavFun  "11.8"  "y18hmrzy7jqq7h9ys54nrr4s49mkzsfh";
+    libav_12  = libavFun "12"     "4ecde7274621c82a6882b7614d907b28de25cc4e";
   };
 
   libavFun = version : sha1 : stdenv.mkDerivation rec {
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 4bcbf0260d7..90be53fc3a0 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7802,7 +7802,7 @@ in
 
   libav = libav_11; # branch 11 is API-compatible with branch 10
   libav_all = callPackage ../development/libraries/libav { };
-  inherit (libav_all) libav_0_8 libav_11;
+  inherit (libav_all) libav_0_8 libav_11 libav_12;
 
   libavc1394 = callPackage ../development/libraries/libavc1394 { };