diff --git a/repository/Grafoscopio/GrafoscopioNode.class.st b/repository/Grafoscopio/GrafoscopioNode.class.st
index 7b19a25..c62da99 100644
--- a/repository/Grafoscopio/GrafoscopioNode.class.st
+++ b/repository/Grafoscopio/GrafoscopioNode.class.st
@@ -819,7 +819,8 @@ GrafoscopioNode >> output: anObject [
 
 { #category : #utility }
 GrafoscopioNode >> pandocOptions [
-	^ self metadata at: 'pandocOptions' ifAbsent: [ ^ '' ]
+	self metadata ifNil: [ ^ nil ].
+	self metadata at: 'pandocOptions' ifAbsent: [ ^ '' ]
 ]
 
 { #category : #utility }
diff --git a/repository/Grafoscopio/GrafoscopioNotebook.class.st b/repository/Grafoscopio/GrafoscopioNotebook.class.st
index 02bd8de..61097e3 100644
--- a/repository/Grafoscopio/GrafoscopioNotebook.class.st
+++ b/repository/Grafoscopio/GrafoscopioNotebook.class.st
@@ -662,6 +662,7 @@ GrafoscopioNotebook >> pandocOptionsComputed [
 
 	| result |
 	result := '' writeStream.
+	self pandocOptions ifNil: [ ^ '' ].
 	self pandocOptions
 		do: [ :option |
 			option isDictionary