diff options
| -rw-r--r-- | markdown/__init__.py | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/markdown/__init__.py b/markdown/__init__.py index a7ee157..3d68d8d 100644 --- a/markdown/__init__.py +++ b/markdown/__init__.py @@ -165,7 +165,7 @@ class Markdown: if isinstance(ext, Extension): # might raise NotImplementedError, but that's the extension author's problem ext.extendMarkdown(self, globals()) - else: + elif ext is not None: raise ValueError('Extension "%s.%s" must be of type: "markdown.Extension".' \ % (ext.__class__.__module__, ext.__class__.__name__)) |