diff --git a/sam3s_example/atmel_softpack_libraries/usb/include/USBLib_Trace.h b/sam3s_example/atmel_softpack_libraries/usb/include/USBLib_Trace.h
index ae35266e..1993c06f 100644
--- a/sam3s_example/atmel_softpack_libraries/usb/include/USBLib_Trace.h
+++ b/sam3s_example/atmel_softpack_libraries/usb/include/USBLib_Trace.h
@@ -196,6 +196,10 @@
 
 #endif
 
+#if defined(USB_NO_DEBUG)
+    #undef TRACE_DEBUG_WP
+    #undef TRACE_INFO_WP
+#endif
 
 /**
  *        Exported variables