diff --git a/pkgs/development/libraries/celt/0.5.1.nix b/pkgs/development/libraries/celt/0.5.1.nix
new file mode 100644
index 000000000000..0f42e7cd0407
--- /dev/null
+++ b/pkgs/development/libraries/celt/0.5.1.nix
@@ -0,0 +1,46 @@
+x@{builderDefsPackage
+  , ...}:
+builderDefsPackage
+(a :
+let
+  helperArgNames = ["stdenv" "fetchurl" "builderDefsPackage"] ++
+    [];
+
+  buildInputs = map (n: builtins.getAttr n x)
+    (builtins.attrNames (builtins.removeAttrs x helperArgNames));
+  sourceInfo = rec {
+    baseName="celt";
+    version="0.5.1.3";
+    name="${baseName}-${version}";
+    url="http://downloads.xiph.org/releases/${baseName}/${name}.tar.gz";
+    hash="0bkam9z5vnrxpbxkkh9kw6yzjka9di56h11iijikdd1f71l5nbpw";
+  };
+in
+rec {
+  src = a.fetchurl {
+    url = sourceInfo.url;
+    sha256 = sourceInfo.hash;
+  };
+
+  inherit (sourceInfo) name version;
+  inherit buildInputs;
+
+  /* doConfigure should be removed if not needed */
+  phaseNames = ["doConfigure" "doMakeInstall"];
+
+  meta = {
+    description = "CELT - low-delay audio codec";
+    maintainers = with a.lib.maintainers;
+    [
+      raskin
+    ];
+    platforms = with a.lib.platforms;
+      linux;
+    license = "free";
+  };
+  passthru = {
+    updateInfo = {
+      downloadPage = "http://www.celt-codec.org/downloads/";
+    };
+  };
+}) x
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3922e569a3a1..fda096dc4877 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3331,6 +3331,7 @@ let
 
   celt = callPackage ../development/libraries/celt {};
   celt_0_7 = callPackage ../development/libraries/celt/0.7.nix {};
+  celt_0_5_1 = callPackage ../development/libraries/celt/0.5.1.nix {};
 
   cgal = callPackage ../development/libraries/CGAL {};