diff --git a/youtube_dl/extractor/zdf.py b/youtube_dl/extractor/zdf.py
index afa3f6c47..145c123a4 100644
--- a/youtube_dl/extractor/zdf.py
+++ b/youtube_dl/extractor/zdf.py
@@ -41,6 +41,7 @@ class ZDFBaseIE(InfoExtractor):
 class ZDFIE(ZDFBaseIE):
     _VALID_URL = r'https?://www\.zdf\.de/(?:[^/]+/)*(?P<id>[^/?]+)\.html'
     _QUALITIES = ('auto', 'low', 'med', 'high', 'veryhigh')
+    _GEO_COUNTRIES = ['DE']
 
     _TESTS = [{
         'url': 'https://www.zdf.de/dokumentation/terra-x/die-magie-der-farben-von-koenigspurpur-und-jeansblau-100.html',