diff --git a/calendar/resources/skin/classic/calendar.css b/calendar/resources/skin/classic/calendar.css
index 64e98875052b..0f86c4dfeb10 100644
--- a/calendar/resources/skin/classic/calendar.css
+++ b/calendar/resources/skin/classic/calendar.css
@@ -1041,8 +1041,8 @@ button.calendar-management-button:hover:active
 }
 
 
-#unifinder-search-results-tree > treechildren treeitem[selected="true"] > treerow,
-#unifinder-categories-tree > treechildren treeitem[selected="true"] > treerow
+#unifinder-search-results-tree listitem[selected="true"] > listcell,
+#unifinder-categories-tree listitem[selected="true"] > listcell
 {
    background-color        : #D5E3F2;
    color                   : #000000;
diff --git a/calendar/resources/skin/modern/calendar.css b/calendar/resources/skin/modern/calendar.css
index 2de85c089b11..248a29d10017 100644
--- a/calendar/resources/skin/modern/calendar.css
+++ b/calendar/resources/skin/modern/calendar.css
@@ -1042,8 +1042,8 @@ button.calendar-management-button:hover:active
 }
 
 
-#unifinder-search-results-tree > treechildren treeitem[selected="true"] > treerow,
-#unifinder-categories-tree > treechildren treeitem[selected="true"] > treerow
+#unifinder-search-results-tree listitem[selected="true"] > listcell,
+#unifinder-categories-tree listitem[selected="true"] > listcell
 {
    background-color        : #D5E3F2;
    color                   : #000000;