diff --git a/libavfilter/vf_vignette.c b/libavfilter/vf_vignette.c
index 972ef7879d..da4c307964 100644
--- a/libavfilter/vf_vignette.c
+++ b/libavfilter/vf_vignette.c
@@ -283,7 +283,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 
 static int config_props(AVFilterLink *inlink)
 {
-    VignetteContext *s = inlink->dst->priv;
+    AVFilterContext * ctx = inlink->dst;
+    VignetteContext *s = ctx->priv;
     FilterLink *l = ff_filter_link(inlink);
     AVRational sar = inlink->sample_aspect_ratio;
 
@@ -304,7 +305,7 @@ static int config_props(AVFilterLink *inlink)
         s->xscale = 1;
     }
     s->dmax = hypot(inlink->w / 2., inlink->h / 2.);
-    av_log(s, AV_LOG_DEBUG, "xscale=%f yscale=%f dmax=%f\n",
+    av_log(ctx, AV_LOG_DEBUG, "xscale=%f yscale=%f dmax=%f\n",
            s->xscale, s->yscale, s->dmax);
 
     s->fmap_linesize = FFALIGN(inlink->w, 32);