diff --git a/app/Observers/LibraryItemObserver.php b/app/Observers/LibraryItemObserver.php
index 30f07d78..978b0087 100644
--- a/app/Observers/LibraryItemObserver.php
+++ b/app/Observers/LibraryItemObserver.php
@@ -37,7 +37,7 @@ class LibraryItemObserver
 
                 if ($libraryItem->type !== 'markdown_article') {
 
-                    if ($libraryItem->doesntHave('libraries', fn($query) => $query->where('is_public', false))
+                    if ($libraryItem->whereDoesntHave('libraries', fn($query) => $query->where('libraries.is_public', false))
                                     ->exists()) {
                         $text = sprintf("Es gibt was Neues zum Lesen oder Anhören:\n\n%s\n\n%s\n\n#Bitcoin #Wissen #Einundzwanzig #gesundesgeld",
                             $libraryItemName,