diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c
index 65f03e4a60..8a4ec9b560 100644
--- a/libavformat/dashdec.c
+++ b/libavformat/dashdec.c
@@ -1155,7 +1155,7 @@ static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
     }
 
 err:
-    av_freep(&c->adaptionset_lang);
+    xmlFree(c->adaptionset_lang);
     return ret;
 }