diff --git a/module_usb_audio/devicedefines.h b/module_usb_audio/devicedefines.h
index 3173281e..f4248cf5 100644
--- a/module_usb_audio/devicedefines.h
+++ b/module_usb_audio/devicedefines.h
@@ -171,7 +171,7 @@
 #endif
 
 /* Whether to run in Audio Class 2.0 mode in USB Full-speed */
-#ifndef FULL_SPEED_AUDIO_2
+#if !defined(FULL_SPEED_AUDIO_2) && !defined(AUDIO_CLASS_FALLBACK)
 #define FULL_SPEED_AUDIO_2    1     /* Default to falling back to UAC2 */
 #endif