diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index c3a4dccaf..38daef0a0 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -1025,7 +1025,7 @@ class InfoExtractor(object):
             })
 
         for e in json_ld:
-            if '@context' in e and re.match(r'^https?://schema.org/?$', e.get('@context')):
+            if isinstance(e.get('@context'), str) and re.match(r'^https?://schema.org/?$', e.get('@context')):
                 item_type = e.get('@type')
                 if expected_type is not None and expected_type != item_type:
                     return info