diff --git a/youtube_dl/extractor/dvtv.py b/youtube_dl/extractor/dvtv.py
index 5f8ac3e46..c1a4bc757 100644
--- a/youtube_dl/extractor/dvtv.py
+++ b/youtube_dl/extractor/dvtv.py
@@ -92,7 +92,7 @@ class DVTVIE(InfoExtractor):
         return {
             'id': metadata['mediaid'],
             'title': unescapeHTML(metadata['title']),
-            'thumbnail': self._proto_relative_url(metadata['image']),
+            'thumbnail': self._proto_relative_url(metadata['image'], 'http:'),
             'formats': formats
         }