diff --git a/YACOSWeb/src/org/yacos/web/author/controller/ArticleDeleteController.java b/YACOSWeb/src/org/yacos/web/author/controller/ArticleDeleteController.java
index 84f1854..39532b9 100644
--- a/YACOSWeb/src/org/yacos/web/author/controller/ArticleDeleteController.java
+++ b/YACOSWeb/src/org/yacos/web/author/controller/ArticleDeleteController.java
@@ -44,10 +44,10 @@ public class ArticleDeleteController implements Controller {
 				return new ModelAndView(new RedirectView("404error.htm"));
 			}
 	
-			if(articleManager.getPreferencesForArticle(articleId)!= null
-					|| userManager.getPCMemberForArticle(articleId)!= null){
+			if(!articleManager.getPreferencesForArticle(articleId).isEmpty()
+					|| !userManager.getPCMemberForArticle(articleId).isEmpty()){
 					return new ModelAndView(new RedirectView("manageArticle.htm?delete=ko"));
-				}
+			}
 			articleManager.removeArticle(articleId);
 
 		}