diff --git a/repository/TiddlyWiki/TiddlyWiki.class.st b/repository/TiddlyWiki/TiddlyWiki.class.st
index 7731e0c..63e33d0 100644
--- a/repository/TiddlyWiki/TiddlyWiki.class.st
+++ b/repository/TiddlyWiki/TiddlyWiki.class.st
@@ -101,7 +101,7 @@ TiddlyWiki >> detectRepository [
 	| folder folderItems |
 	folder := self file parent.
 	folderItems := folder children.
-	[(folderItems select: [ :path | path fullName endsWith: '.fossil' ]) isEmpty]
+	[(folderItems select: [ :path | path basename beginsWith: '.fossil' ]) isEmpty]
 		whileTrue: [folder := folder parent.
 			folderItems := folder children.].
 	^ folder