diff --git a/preferences/inc/class.bocategories.inc.php b/preferences/inc/class.bocategories.inc.php
index c906df6d44..4d025b0087 100644
--- a/preferences/inc/class.bocategories.inc.php
+++ b/preferences/inc/class.bocategories.inc.php
@@ -106,9 +106,9 @@
 			return $this->cats->formated_list($format,$type,$cat_parent,$global_cats);
 		}
 
-		function delete($cat_id,$subs)
+		function delete($cat_id,$drop_subs,$modify_subs=false)
 		{
-			return $this->cats->delete($cat_id,$subs);
+			return $this->cats->delete($cat_id,$drop_subs,$modify_subs);
 		}
 
 		function check_values($values)
diff --git a/preferences/inc/class.uicategories.inc.php b/preferences/inc/class.uicategories.inc.php
index 42e6b7040e..f039dd12be 100644
--- a/preferences/inc/class.uicategories.inc.php
+++ b/preferences/inc/class.uicategories.inc.php
@@ -551,7 +551,7 @@
 				}
 				else
 				{
-					$this->bo->delete($cat_id,False);
+					$this->bo->delete($cat_id,False,True);
 				}
 				$GLOBALS['phpgw']->redirect_link('/index.php',$link_data);
 			}