diff --git a/pkgs/development/libraries/libftdi/default.nix b/pkgs/development/libraries/libftdi/default.nix
index 2f499d3af87..fff760c5519 100644
--- a/pkgs/development/libraries/libftdi/default.nix
+++ b/pkgs/development/libraries/libftdi/default.nix
@@ -14,6 +14,14 @@ stdenv.mkDerivation rec {
 
   # Hack to avoid TMPDIR in RPATHs.
   preFixup = ''rm -rf "$(pwd)" '';
+  configureFlags = [ "--with-async-mode" ];
+
+  # allow async mode. from ubuntu. see:
+  #   https://bazaar.launchpad.net/~ubuntu-branches/ubuntu/trusty/libftdi/trusty/view/head:/debian/patches/04_async_mode.diff
+  patchPhase = ''
+    substituteInPlace ./src/ftdi.c \
+      --replace "ifdef USB_CLASS_PTP" "if 0"
+  '';
 
   meta = {
     description = "A library to talk to FTDI chips using libusb";