1 files changed, 2 insertions, 0 deletions
diff --git a/shared-module/audiomp3/MP3Decoder.h b/shared-module/audiomp3/MP3Decoder.h
index 9ee1d0949..f91f102a2 100644
--- a/shared-module/audiomp3/MP3Decoder.h
+++ b/shared-module/audiomp3/MP3Decoder.h
@@ -28,6 +28,7 @@
 #ifndef MICROPY_INCLUDED_SHARED_MODULE_AUDIOIO_MP3FILE_H
 #define MICROPY_INCLUDED_SHARED_MODULE_AUDIOIO_MP3FILE_H
 
+#include "supervisor/background_callback.h"
 #include "extmod/vfs_fat.h"
 #include "py/obj.h"
 
@@ -36,6 +37,7 @@
 typedef struct {
     mp_obj_base_t base;
     struct _MP3DecInfo *decoder;
+    background_callback_t inbuf_fill_cb;
     uint8_t* inbuf;
     uint32_t inbuf_length;
     uint32_t inbuf_offset;