diff --git a/src/skins/vector/css/vector-web/structures/_LeftPanel.scss b/src/skins/vector/css/vector-web/structures/_LeftPanel.scss
index a2147a025d..b099cff766 100644
--- a/src/skins/vector/css/vector-web/structures/_LeftPanel.scss
+++ b/src/skins/vector/css/vector-web/structures/_LeftPanel.scss
@@ -23,6 +23,7 @@ limitations under the License.
 
 .mx_LeftPanel_container {
     display: flex;
+    flex: 0 0 235px;
 }
 
 .mx_LeftPanel_hideButton {