diff --git a/src/skins/vector/css/vector-web/structures/RoomSubList.css b/src/skins/vector/css/vector-web/structures/RoomSubList.css
index 8e3c228a86..bc7f15e687 100644
--- a/src/skins/vector/css/vector-web/structures/RoomSubList.css
+++ b/src/skins/vector/css/vector-web/structures/RoomSubList.css
@@ -22,6 +22,7 @@ limitations under the License.
 
 .mx_RoomSubList_labelContainer {
     height: 29px;
+    width: 235px; /* LHS Panel width */
     position: relative;
 }
 
@@ -50,7 +51,8 @@ limitations under the License.
 }
 
 .collapsed .mx_RoomSubList_label {
-    height: 16px;
+    height: 17px;
+    width: 28px; /* collapsed LHS Panel width */
 }
 
 .mx_RoomSubList_roomCount {