Index: apps/debug_menu.c
===================================================================
--- apps/debug_menu.c	(revision 20753)
+++ apps/debug_menu.c	(working copy)
@@ -2584,7 +2584,7 @@
 #endif
 
 #if defined (HAVE_USBSTACK) \
-   && (defined(ROCKBOX_HAS_LOGF) && defined(USB_SERIAL) || defined(USB_HID))
+   && ((defined(ROCKBOX_HAS_LOGF) && defined(USB_SERIAL)) || defined(USB_HID))
 static bool toggle_usb_core_driver(int driver, char *msg)
 {
     bool enabled = !usb_core_driver_enabled(driver);