diff --git a/ion/src/device/usb_dfu_xip_flash.cpp b/ion/src/device/usb_dfu_xip_flash.cpp
index f2985f394..ffde4e5b6 100644
--- a/ion/src/device/usb_dfu_xip_flash.cpp
+++ b/ion/src/device/usb_dfu_xip_flash.cpp
@@ -1,4 +1,4 @@
-#include 
+#include "usb/calculator.h"
 
 namespace Ion {
 namespace USB {