diff --git a/pkgs/development/libraries/openmpi/default.nix b/pkgs/development/libraries/openmpi/default.nix
index d32cbd51606c..6e61b743a568 100644
--- a/pkgs/development/libraries/openmpi/default.nix
+++ b/pkgs/development/libraries/openmpi/default.nix
@@ -1,10 +1,10 @@
 {stdenv, fetchurl, gfortran}:
 
 stdenv.mkDerivation {
-  name = "openmpi-1.6.4";
+  name = "openmpi-1.6.5";
   src = fetchurl {
-    url = http://www.open-mpi.org/software/ompi/v1.6/downloads/openmpi-1.6.4.tar.bz2 ;
-    sha1 = "38095d3453519177272f488d5058a98f7ebdbf10";
+    url = http://www.open-mpi.org/software/ompi/v1.6/downloads/openmpi-1.6.5.tar.bz2 ;
+    sha256 = "11gws4d3z7934zna2r7m1f80iay2ha17kp42mkh39wjykfwbldzy";
   };
   buildInputs = [ gfortran ];
   meta = {