diff --git a/pkgs/applications/science/math/msieve/default.nix b/pkgs/applications/science/math/msieve/default.nix
index 3d4d5b8a197d..1de6d416a0e6 100644
--- a/pkgs/applications/science/math/msieve/default.nix
+++ b/pkgs/applications/science/math/msieve/default.nix
@@ -1,12 +1,13 @@
-{ lib, stdenv, fetchurl, zlib, gmp, ecm }:
+{ lib, stdenv, fetchsvn, zlib, gmp, ecm }:
 
 stdenv.mkDerivation rec {
   pname = "msieve";
-  version = "1.53";
+  version = "r1050";
 
-  src = fetchurl {
-    url = "mirror://sourceforge/msieve/msieve/Msieve%20v${version}/msieve${lib.replaceStrings ["."] [""] version}_src.tar.gz";
-    sha256 = "1d1vv7j4rh3nnxsmvafi73qy7lw7n3akjlm5pjl3m936yapvmz65";
+  src = fetchsvn {
+    url = "svn://svn.code.sf.net/p/msieve/code/trunk";
+    rev = "1050";
+    hash = "sha256-cn6OhE4zhrpB7BFrRdOnucjATbfo5mLkK7O0Usx1quE=";
   };
 
   buildInputs = [ zlib gmp ecm ];