diff --git a/host_usb_mixer_control/Makefile.OSX b/host_usb_mixer_control/Makefile.OSX
index d46367f9..aa69f273 100644
--- a/host_usb_mixer_control/Makefile.OSX
+++ b/host_usb_mixer_control/Makefile.OSX
@@ -1,2 +1,3 @@
 all:
-	g++ -g -o xmos_mixer OSX/usb_mixer.cpp mixer_app.cpp -I. -IOSX OSX/libusb-1.0.0.dylib -m64
\ No newline at end of file
+	g++ -g -o xmos_mixer OSX/usb_mixer.cpp mixer_app.cpp -I. -IOSX OSX/libusb-1.0.0.dylib -arch x86_64
+