@@ -295,6 +295,7 @@ static int query_formats(AVFilterContext *ctx)

 static int config_input(AVFilterLink *inlink)

 {

     HQDN3DContext *hqdn3d = inlink->dst->priv;

+    int i;

     hqdn3d->hsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_w;

     hqdn3d->vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h;

@@ -304,7 +305,7 @@ static int config_input(AVFilterLink *inlink)

     if (!hqdn3d->line)

         return AVERROR(ENOMEM);

-    for (int i=0; i<4; i++) {

+    for (i=0; i<4; i++) {

         hqdn3d->coefs[i] = precalc_coefs(hqdn3d->strength[i], hqdn3d->depth);

         if (!hqdn3d->coefs[i])

             return AVERROR(ENOMEM);