diff --git a/libavdevice/lavfi.c b/libavdevice/lavfi.c
index ede391f4d6..986e579813 100644
--- a/libavdevice/lavfi.c
+++ b/libavdevice/lavfi.c
@@ -121,7 +121,7 @@ av_cold static int lavfi_read_header(AVFormatContext *avctx)
 {
     LavfiContext *lavfi = avctx->priv_data;
     AVFilterInOut *input_links = NULL, *output_links = NULL, *inout;
-    AVFilter *buffersink, *abuffersink;
+    const AVFilter *buffersink, *abuffersink;
     int *pix_fmts = create_all_formats(AV_PIX_FMT_NB);
     enum AVMediaType type;
     int ret = 0, i, n;