diff --git a/fftools/ffmpeg_mux.c b/fftools/ffmpeg_mux.c
index 2c01aec665..335b8b42ca 100644
--- a/fftools/ffmpeg_mux.c
+++ b/fftools/ffmpeg_mux.c
@@ -506,14 +506,14 @@ int print_sdp(const char *filename);
 int print_sdp(const char *filename)
 {
     char sdp[16384];
-    int j, ret;
+    int j = 0, ret;
     AVIOContext *sdp_pb;
     AVFormatContext **avc;
 
     avc = av_malloc_array(nb_output_files, sizeof(*avc));
     if (!avc)
         return AVERROR(ENOMEM);
-    for (int i = 0, j = 0; i < nb_output_files; i++) {
+    for (int i = 0; i < nb_output_files; i++) {
         if (!strcmp(output_files[i]->format->name, "rtp")) {
             avc[j] = mux_from_of(output_files[i])->fc;
             j++;