1 files changed, 2 insertions, 0 deletions
diff --git a/src/node.h b/src/node.h
index c0c43d3..74eddd4 100644
--- a/src/node.h
+++ b/src/node.h
@@ -49,6 +49,8 @@ struct cmark_node {
 	struct cmark_node *first_child;
 	struct cmark_node *last_child;
 
+	void *user_data;
+
 	int start_line;
 	int start_column;
 	int end_line;