diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c
index 665f80e600..98e14661f3 100644
--- a/libavfilter/avfiltergraph.c
+++ b/libavfilter/avfiltergraph.c
@@ -412,9 +412,9 @@ static int query_formats(AVFilterContext *graphctx)
 
                     avfilter_graph_add_filter(graphctx, scale);
                     scale->filter->query_formats(scale);
-                    if(avfilter_merge_formats(scale-> inputs[0]->in_formats,
+                    if(!avfilter_merge_formats(scale-> inputs[0]->in_formats,
                                               scale-> inputs[0]->out_formats) ||
-                       avfilter_merge_formats(scale->outputs[0]->in_formats,
+                       !avfilter_merge_formats(scale->outputs[0]->in_formats,
                                               scale->outputs[0]->out_formats))
                         return -1;
                 }