diff --git a/repository/Grafoscopio/GrafoscopioBrowser.class.st b/repository/Grafoscopio/GrafoscopioBrowser.class.st
index c54b7fa..3c85e37 100644
--- a/repository/Grafoscopio/GrafoscopioBrowser.class.st
+++ b/repository/Grafoscopio/GrafoscopioBrowser.class.st
@@ -139,7 +139,7 @@ GrafoscopioBrowser class >> openHelpInPdf [
 	"Launches the help manual in PDF format in an external viewer."
 	
 	| pdfHelpFileLocation |
-	pdfHelpFileLocation  := (FileSystem disk workingDirectory parent / 'Docs/Es/Manual/manual-grafoscopio.pdf') fullName.
+	pdfHelpFileLocation  := (FileSystem disk workingDirectory parent / 'Docs' /'Es' / 'Manual' / 'manual-grafoscopio.pdf') fullName.
 	Smalltalk platform name = 'unix'
 		ifTrue: [ 
 			OSProcess command: 'xdg-open ', pdfHelpFileLocation.