diff --git a/module_usb_audio/main.xc b/module_usb_audio/main.xc
index 27ca08e9..2d46bddf 100755
--- a/module_usb_audio/main.xc
+++ b/module_usb_audio/main.xc
@@ -675,11 +675,13 @@ int main()
 #endif
 
 
+#ifndef NO_USB
 #if (XUD_TILE != 0 ) && (AUDIO_IO_TILE != 0)
         /* Run flash code on its own - hope it gets combined */
 #warning Running DFU flash code on its own
         on stdcore[0]: DFUHandler(dfuInterface, null);
 #endif
+#endif
 
 #ifndef PDM_RECORD    
 #if (NUM_PDM_MICS > 0)