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-rw-r--r--python/fatcat_tools/importers/doaj_article.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/python/fatcat_tools/importers/doaj_article.py b/python/fatcat_tools/importers/doaj_article.py
index cd063337..56045ea7 100644
--- a/python/fatcat_tools/importers/doaj_article.py
+++ b/python/fatcat_tools/importers/doaj_article.py
@@ -382,7 +382,7 @@ class DoajArticleImporter(EntityImporter):
if not license.get("open_access"):
continue
slug = license.get("type")
- if slug.startswith("CC "):
+ if slug and slug.startswith("CC "):
slug = slug.replace("CC ", "cc-").lower()
return slug
return None