diff --git a/searx/plugins/oa_doi_rewrite.py b/searx/plugins/oa_doi_rewrite.py
index f558bf69..d4942498 100644
--- a/searx/plugins/oa_doi_rewrite.py
+++ b/searx/plugins/oa_doi_rewrite.py
@@ -30,7 +30,8 @@ def get_doi_resolver(args, preference_doi_resolver):
     doi_resolver = args.get('doi_resolver', preference_doi_resolver)[0]
     if doi_resolver not in doi_resolvers:
         doi_resolvers = settings['default_doi_resolver']
-    return doi_resolver
+    doi_resolver_url = doi_resolvers[doi_resolver]
+    return doi_resolver_url
 
 
 def on_result(request, search, result):
diff --git a/searx/settings.yml b/searx/settings.yml
index de56eda0..0c6f642f 100644
--- a/searx/settings.yml
+++ b/searx/settings.yml
@@ -765,5 +765,6 @@ doi_resolvers :
   oadoi.org : 'https://oadoi.org/'
   doi.org : 'https://doi.org/'
   doai.io  : 'http://doai.io/'
+  sci-hub.tw : 'http://sci-hub.tw/'
 
 default_doi_resolver : 'oadoi.org'