diff --git a/src/skins/vector/css/matrix-react-sdk/views/rooms/MemberList.css b/src/skins/vector/css/matrix-react-sdk/views/rooms/MemberList.css
index de05d3e8c4b..5844d5f1d72 100644
--- a/src/skins/vector/css/matrix-react-sdk/views/rooms/MemberList.css
+++ b/src/skins/vector/css/matrix-react-sdk/views/rooms/MemberList.css
@@ -46,8 +46,8 @@ limitations under the License.
 
 .mx_MemberList .mx_SearchableEntityList {
     order: 1;
-    flex: 0;
-    -webkit-flex: 0;
+    flex: 0 0 auto;
+    -webkit-flex: 0 0 auto;
 }
 
 .mx_MemberList .mx_SearchableEntityList_expanded {
diff --git a/src/skins/vector/css/matrix-react-sdk/views/rooms/SearchableEntityList.css b/src/skins/vector/css/matrix-react-sdk/views/rooms/SearchableEntityList.css
index 3cdc291cc8c..3e88508cd04 100644
--- a/src/skins/vector/css/matrix-react-sdk/views/rooms/SearchableEntityList.css
+++ b/src/skins/vector/css/matrix-react-sdk/views/rooms/SearchableEntityList.css
@@ -63,8 +63,8 @@ limitations under the License.
 
 .mx_SearchableEntityList_hrWrapper {
     width: 100%;
-    flex: 0;
-    -webkit-flex: 0;    
+    flex: 0 0 auto;
+    -webkit-flex: 0 0 auto;    
 }
 
 .mx_SearchableEntityList hr {