diff --git a/xed/resources/css/xed-style.css b/xed/resources/css/xed-style.css
index 984ca8a..a910576 100644
--- a/xed/resources/css/xed-style.css
+++ b/xed/resources/css/xed-style.css
@@ -1,7 +1,7 @@
-.xed-map-frame:dir(ltr) {
+.xed-map-frame:dir(ltr) border {
     border-width: 0 0 0 1px;
 }
 
-.xed-map-frame:dir(rtl) {
+.xed-map-frame:dir(rtl) border {
     border-width: 0 1px 0 0;
-}
\ No newline at end of file
+}