diff --git a/pkgs/development/libraries/opencv/3.x.nix b/pkgs/development/libraries/opencv/3.x.nix
index eed77b9113a..365f11f88f0 100644
--- a/pkgs/development/libraries/opencv/3.x.nix
+++ b/pkgs/development/libraries/opencv/3.x.nix
@@ -1,5 +1,6 @@
 { lib, stdenv, fetchurl, cmake, gtk, libjpeg, libpng, libtiff, jasper, ffmpeg
 , fetchpatch, pkgconfig, gstreamer, xineLib, glib, python27, python27Packages, unzip
+, enableIpp ? false
 , enableBloat ? false }:
 
 let v = "3.0.0"; in
@@ -12,15 +13,27 @@ stdenv.mkDerivation rec {
     sha256 = "00dh7wvgkflz22liqd10fma8m3395lb3l3rgawnn5wlnz6i4w287";
   };
 
+  postPatch =
+    let ippicv = fetchurl {
+          url = "http://sourceforge.net/projects/opencvlibrary/files/3rdparty/ippicv/${ippicvName}";
+          md5 = ippicvHash;
+        };
+        ippicvName    = "ippicv_linux_20141027.tgz";
+        ippicvHash    = "8b449a536a2157bcad08a2b9f266828b";
+        ippicvArchive = "3rdparty/ippicv/downloads/linux-${ippicvHash}/${ippicvName}";
+    in stdenv.lib.optionalString enableIpp
+      ''
+        mkdir -p $(dirname ${ippicvArchive})
+        ln -s ${ippicv}    ${ippicvArchive}
+      '';
+
   buildInputs =
     [ unzip libjpeg libpng libtiff ]
     ++ lib.optionals enableBloat [ gtk glib jasper ffmpeg xineLib gstreamer python27 python27Packages.numpy ];
 
   nativeBuildInputs = [ cmake pkgconfig ];
 
-  # TODO: Pre-download IPP so that OpenCV doesn't try to download it itself
-  # (which fails).
-  cmakeFlags = [ "-DWITH_IPP=OFF" ];
+  cmakeFlags = [ "-DWITH_IPP=${if enableIpp then "ON" else "OFF"}" ];
 
   enableParallelBuilding = true;