diff --git a/src/MiniDocs/Markdown.class.st b/src/MiniDocs/Markdown.class.st
index 93119a1..c99a7f2 100644
--- a/src/MiniDocs/Markdown.class.st
+++ b/src/MiniDocs/Markdown.class.st
@@ -50,7 +50,7 @@ Markdown >> body: aString [
 { #category : #operation }
 Markdown >> commentYAMLMetadata [
 	| newContents |
-	self detectYAMLMetadata ifFalse: [ ^ self ].
+	self contents detectYAMLMetadata ifFalse: [ ^ self ].
 	newContents := '' writeStream.
 	newContents nextPutAll: '<!--@yaml'; lf.
 	newContents nextPutAll: self yamlMetadataString.