diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index b648b850c315..e3805c652ff7 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4228,13 +4228,22 @@ in {
 
   cython = buildPythonPackage rec {
     name = "Cython-${version}";
-    version = "0.25.1";
+    version = "0.25.2";
 
     src = pkgs.fetchurl {
       url = "mirror://pypi/C/Cython/${name}.tar.gz";
-      sha256 = "e0941455769335ec5afb17dee36dc3833b7edc2ae20a8ed5806c58215e4b6669";
+      sha256 = "01h3lrf6d98j07iakifi81qjszh6faa37ibx7ylva1vsqbwx2hgi";
     };
 
+    # On i686-linux and Python 2.x this test fails because the result is "3L"
+    # instead of "3", so let's fix it in-place.
+    #
+    # Upstream issue: https://github.com/cython/cython/issues/1548
+    postPatch = optionalString (stdenv.isi686 && !isPy3k) ''
+      sed -i -e 's/\(>>> *\)\(verify_resolution_GH1533()\)/\1int(\2)/' \
+        tests/run/cpdef_enums.pyx
+    '';
+
     buildInputs = with self; [ pkgs.glibcLocales pkgs.pkgconfig pkgs.gdb ];
     # For testing
     nativeBuildInputs = with self; [ numpy pkgs.ncurses ];