diff --git a/firmware/hackrf_usb/usb_bulk_buffer.h b/firmware/hackrf_usb/usb_bulk_buffer.h
index 3e284143..9787ee24 100644
--- a/firmware/hackrf_usb/usb_bulk_buffer.h
+++ b/firmware/hackrf_usb/usb_bulk_buffer.h
@@ -27,8 +27,8 @@
 #include <stdbool.h>
 #include <stdint.h>
 
-#define USB_BULK_BUFFER_SIZE 0x8000
-#define USB_BULK_BUFFER_MASK 0x7FFF
+#define USB_BULK_BUFFER_SIZE 0x10000 
+#define USB_BULK_BUFFER_MASK 0xFFFF
 
 /* Address of usb_bulk_buffer is set in ldscripts. If you change the name of this
  * variable, it won't be where it needs to be in the processor's address space,