diff --git a/md_yaml/mdx_meta_yaml/__init__.py b/md_yaml/mdx_meta_yaml/__init__.py
index cd0229f..16d8309 100644
--- a/md_yaml/mdx_meta_yaml/__init__.py
+++ b/md_yaml/mdx_meta_yaml/__init__.py
@@ -5,4 +5,6 @@ from mdx_meta_yaml.extension import MetaYamlExtension
 def makeExtension(configs=None):
 	if isinstance(configs, list):
 		configs = dict(configs)
+        elif configs is None:
+		configs  = {}
 	return MetaYamlExtension(configs=configs)