diff --git a/pelican/readers.py b/pelican/readers.py
index 0616eecd..7ff393c5 100644
--- a/pelican/readers.py
+++ b/pelican/readers.py
@@ -51,11 +51,9 @@ class MarkdownReader(object):
         metadatas = {}
         for name, value in md.Meta.items():
             name = name.lower()
-            if name in _METADATAS_FIELDS:
-                meta = _METADATAS_FIELDS[name](value[0])
-            else:
-                meta = value[0]
-            metadatas[name] = meta
+            metadatas[name] = _METADATAS_FIELDS.get(
+                name, lambda x:x
+            )(value[0])
         return content, metadatas
 
 _EXTENSIONS = {'rst': RstReader, 'md': MarkdownReader}  # supported formats