diff --git a/module_usb_audio/endpoint0/endpoint0.xc b/module_usb_audio/endpoint0/endpoint0.xc
index 0dd3d312..8c88ad65 100755
--- a/module_usb_audio/endpoint0/endpoint0.xc
+++ b/module_usb_audio/endpoint0/endpoint0.xc
@@ -558,6 +558,7 @@ void Endpoint0( chanend c_ep0_out, chanend c_ep0_in, chanend c_audioControl,
 #endif
 
 #ifdef VENDOR_AUDIO_REQS
+#error
                             /* If retVal is 1 at this point, then request to audio interface not handled - handle vendor audio reqs */
                             if(retVal == 1)
                             {
@@ -567,9 +568,7 @@ void Endpoint0( chanend c_ep0_out, chanend c_ep0_in, chanend c_audioControl,
                             	    c_audioControl, c_mix_ctl, c_clk_ctl); 
                             }
 #endif
-#ifdef DFU
                         }
-#endif
                     }
                     break;