diff --git a/skins/base/css/organisms/RoomView.css b/skins/base/css/organisms/RoomView.css
index ceb8a06895..f860b23ef9 100644
--- a/skins/base/css/organisms/RoomView.css
+++ b/skins/base/css/organisms/RoomView.css
@@ -64,7 +64,7 @@ limitations under the License.
     order: 3;
 
     width: 100%;
-    flex: 1;
+    flex: 1 1 0;
     margin-top: 18px;
     margin-bottom: 18px;