diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index 28fc39e568..d431258135 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -94,8 +94,6 @@ int avfilter_link(AVFilterContext *src, unsigned srcpad,
 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
                            unsigned in, unsigned out)
 {
-    AVFilterFormats *formats;
-
     av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s'\n",
             filt->filter->name);
 
@@ -113,7 +111,7 @@ int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
 
     /* if any information on supported colorspaces already exists on the
      * link, we need to preserve that */
-    if((formats = link->out_formats))
+    if(link->out_formats)
         avfilter_formats_changeref(&link->out_formats,
                                    &filt->outputs[out]->out_formats);