diff --git a/libavdevice/lavfi.c b/libavdevice/lavfi.c
index d525bfb6f5..aca102f7d6 100644
--- a/libavdevice/lavfi.c
+++ b/libavdevice/lavfi.c
@@ -178,7 +178,7 @@ av_cold static int lavfi_read_header(AVFormatContext *avctx,
                                                 pix_fmts, lavfi->graph)) < 0)
             FAIL(ret);
         lavfi->sinks[i] = sink;
-        if ((ret = avfilter_link(inout->filter_ctx, 0, sink, 0)) < 0)
+        if ((ret = avfilter_link(inout->filter_ctx, inout->pad_idx, sink, 0)) < 0)
             FAIL(ret);
     }