--- venv/lib/python3.7/site-packages/pelican/readers.py
+++ venv/lib/python3.7/site-packages/pelican/readers.py
@@ -291,7 +291,9 @@
         content = parts.get('body')

         metadata = self._parse_metadata(pub.document, source_path)
-        metadata.setdefault('title', parts.get('title'))
+        title = parts.get('title')
+        if title:
+            metadata.setdefault('title', parts.get('title'))

         return content, metadata