diff --git a/pkgs/tools/networking/iperf/2.nix b/pkgs/tools/networking/iperf/2.nix
index 0c90047e05e..9faa0f95351 100644
--- a/pkgs/tools/networking/iperf/2.nix
+++ b/pkgs/tools/networking/iperf/2.nix
@@ -9,6 +9,7 @@ stdenv.mkDerivation rec {
   };
 
   hardeningDisable = [ "format" ];
+  configureFlags = [ "--enable-fastsampling" ];
 
   meta = with stdenv.lib; {
     homepage = https://sourceforge.net/projects/iperf/;