diff --git a/libavcodec/audiotoolboxdec.c b/libavcodec/audiotoolboxdec.c
index 31e14d4f90..58d05f8e55 100644
--- a/libavcodec/audiotoolboxdec.c
+++ b/libavcodec/audiotoolboxdec.c
@@ -414,6 +414,7 @@ static OSStatus ffat_decode_callback(AudioConverterRef converter, UInt32 *nb_pac
         return 0;
     }
 
+    av_packet_unref(&at->in_pkt);
     av_packet_move_ref(&at->in_pkt, &at->new_in_pkt);
     at->new_in_pkt.data = 0;
     at->new_in_pkt.size = 0;