diff --git a/doc/examples/metadata.c b/doc/examples/metadata.c
index b6cfa6bd36..7c44009a24 100644
--- a/doc/examples/metadata.c
+++ b/doc/examples/metadata.c
@@ -34,7 +34,7 @@
 int main (int argc, char **argv)
 {
     AVFormatContext *fmt_ctx = NULL;
-    AVDictionaryEntry *tag = NULL;
+    const AVDictionaryEntry *tag = NULL;
     int ret;
 
     if (argc != 2) {