diff --git a/pkgs/tools/networking/iperf/3.nix b/pkgs/tools/networking/iperf/3.nix
index c59eb09f4c5..bea61b082ec 100644
--- a/pkgs/tools/networking/iperf/3.nix
+++ b/pkgs/tools/networking/iperf/3.nix
@@ -9,6 +9,9 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs = [ openssl ];
+  configureFlags = [
+    "--with-openssl=${openssl.dev}"
+  ];
 
   outputs = [ "out" "man" ];