diff --git a/libavcodec/bitstream_filter.c b/libavcodec/bitstream_filter.c
index 8599b90d4a..d2bf86d894 100644
--- a/libavcodec/bitstream_filter.c
+++ b/libavcodec/bitstream_filter.c
@@ -131,7 +131,7 @@ int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
             return ret;
     }
 
-    pkt.data = buf;
+    pkt.data = (uint8_t *)buf;
     pkt.size = buf_size;
 
     ret = av_bsf_send_packet(priv->ctx, &pkt);