diff --git a/hwe/css/map.css b/hwe/css/map.css
index 89ea6b30..fb40ae50 100644
--- a/hwe/css/map.css
+++ b/hwe/css/map.css
@@ -63,8 +63,8 @@
 
 .world_map.map_detail .city_filler{
     position:absolute;
-    width:100%;
-    height:100%;
+    width:calc(100% + 2px);
+    height:calc(100% + 2px);
     left:-1px;
     top:-1px;
     background:transparent;