diff --git a/libavcodec/vp9.c b/libavcodec/vp9.c
index 45f0771695..c11e9b8601 100644
--- a/libavcodec/vp9.c
+++ b/libavcodec/vp9.c
@@ -1251,7 +1251,7 @@ static int vp9_decode_packet(AVCodecContext *avctx, void *frame,
                 data += sz;
                 size -= sz;
             }
-            return size;
+            return avpkt->size;
         }
     }