diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index 1202146607..50f0edd332 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -3275,9 +3275,8 @@ static int opt_audio_qscale(void *optctx, const char *opt, const char *arg)
 
 static int opt_filter_complex(void *optctx, const char *opt, const char *arg)
 {
-    FilterGraph *fg;
-    ALLOC_ARRAY_ELEM(filtergraphs, nb_filtergraphs);
-    fg = filtergraphs[nb_filtergraphs - 1];
+    FilterGraph *fg = ALLOC_ARRAY_ELEM(filtergraphs, nb_filtergraphs);
+
     fg->index      = nb_filtergraphs - 1;
     fg->graph_desc = av_strdup(arg);
     if (!fg->graph_desc)