diff --git a/libavcodec/internal.h b/libavcodec/internal.h
index 8d0832b39c..eb82d79793 100644
--- a/libavcodec/internal.h
+++ b/libavcodec/internal.h
@@ -31,7 +31,7 @@
 #include "libavutil/pixfmt.h"
 #include "avcodec.h"
 
-#define FF_SANE_NB_CHANNELS 128U
+#define FF_SANE_NB_CHANNELS 63U
 
 typedef struct FramePool {
     /**