only simtrace is bus-powered, SAM3 on qmod + owhw are self-powered
diff --git a/firmware/libboard/qmod/include/board.h b/firmware/libboard/qmod/include/board.h
index 16a38a8..106d5d0 100644
--- a/firmware/libboard/qmod/include/board.h
+++ b/firmware/libboard/qmod/include/board.h
@@ -55,6 +55,8 @@
 
 #define PIN_VERSION_DET		{PIO_PA19, PIOA, ID_PIOA, PIO_PERIPH_D, PIO_DEFAULT}
 
+#define BOARD_USB_BMATTRIBUTES	USBConfigurationDescriptor_SELFPOWERED_NORWAKEUP
+
 #define SIMTRACE_VENDOR_ID          0x1d50
 #define SIMTRACE_PRODUCT_ID         0x60e3	/* FIXME */
 #define USB_VENDOR_ID               SIMTRACE_VENDOR_ID