diff --git a/module_usb_audio/clocking/clockgen.xc b/module_usb_audio/clocking/clockgen.xc
index 63628475..3da5ea1c 100644
--- a/module_usb_audio/clocking/clockgen.xc
+++ b/module_usb_audio/clocking/clockgen.xc
@@ -5,8 +5,10 @@
 
 #include "devicedefines.h"
 #include "commands.h"
-#include "SpdifReceive.h"
 
+#if defined(SPDIF_RX)
+#include "SpdifReceive.h"
+#endif