diff --git a/pandoc_reader.py b/pandoc_reader.py
index ea4e9b7..fb865f2 100644
--- a/pandoc_reader.py
+++ b/pandoc_reader.py
@@ -65,10 +65,6 @@ class PandocReader(BaseReader):
         bib_header = self.settings.get('PANDOC_BIBHEADER', None)
 
         filters = self.settings.get('PANDOC_FILTERS', [])
-        extensions = self.settings.get('PANDOC_EXTENSIONS', '')
-        if isinstance(extensions, list):
-            extensions = ''.join(extensions)
-
         extra_args = self.settings.get('PANDOC_ARGS', [])
         extensions = self.settings.get('PANDOC_EXTENSIONS', '')
         if isinstance(extensions, list):