diff --git a/libavformat/smjpegenc.c b/libavformat/smjpegenc.c
index 888ece2f7c..edba08cf9b 100644
--- a/libavformat/smjpegenc.c
+++ b/libavformat/smjpegenc.c
@@ -35,7 +35,7 @@ typedef struct SMJPEGMuxContext {
 
 static int smjpeg_write_header(AVFormatContext *s)
 {
-    AVDictionaryEntry *t = NULL;
+    const AVDictionaryEntry *t = NULL;
     AVIOContext *pb = s->pb;
     int n, tag;
 
@@ -48,7 +48,7 @@ static int smjpeg_write_header(AVFormatContext *s)
     avio_wb32(pb, 0);
 
     ff_standardize_creation_time(s);
-    while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
+    while ((t = av_dict_iterate(s->metadata, t))) {
         avio_wl32(pb, SMJPEG_TXT);
         avio_wb32(pb, strlen(t->key) + strlen(t->value) + 3);
         avio_write(pb, t->key, strlen(t->key));