diff --git a/host/libhackrf/src/hackrf.c b/host/libhackrf/src/hackrf.c
index 790c8431..4eb87ae5 100644
--- a/host/libhackrf/src/hackrf.c
+++ b/host/libhackrf/src/hackrf.c
@@ -958,6 +958,7 @@ int ADDCALL hackrf_set_lna_gain(hackrf_device* device, uint32_t value)
 		return HACKRF_ERROR_INVALID_PARAM;
 	}
 
+	value &= ~(1<<3);
 	result = libusb_control_transfer(
 		device->usb_device,
 		LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE,
@@ -987,6 +988,7 @@ int ADDCALL hackrf_set_vga_gain(hackrf_device* device, uint32_t value)
 		return HACKRF_ERROR_INVALID_PARAM;
 	}
 
+	value &= ~(1<<0);
 	result = libusb_control_transfer(
 		device->usb_device,
 		LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE,