diff --git a/pkgs/tools/networking/iperf/2.nix b/pkgs/tools/networking/iperf/2.nix
index 13f8cedc673..c0fd6c973cd 100644
--- a/pkgs/tools/networking/iperf/2.nix
+++ b/pkgs/tools/networking/iperf/2.nix
@@ -1,19 +1,19 @@
 { stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
-  name = "iperf-2.0.5";
+  name = "iperf-2.0.9";
 
   src = fetchurl {
-    url = "mirror://sourceforge/iperf/${name}.tar.gz";
-    sha256 = "0nr6c81x55ihs7ly2dwq19v9i1n6wiyad1gacw3aikii0kzlwsv3";
+    url = "mirror://sourceforge/iperf2/files/${name}.tar.gz";
+    sha256 = "1gzh8dk2myqgxznxrryib4zsw23ffvx0s5j7sa780vk86lgr20nv";
   };
 
   hardeningDisable = [ "format" ];
 
   meta = with stdenv.lib; {
-    homepage = "http://sourceforge.net/projects/iperf/"; 
+    homepage = "http://sourceforge.net/projects/iperf/";
     description = "Tool to measure IP bandwidth using UDP or TCP";
     platforms = platforms.unix;
-    license = "as-is";
+    license = licenses.mit;
   };
 }