diff --git a/res/css/views/dialogs/_AddExistingToSpaceDialog.pcss b/res/css/views/dialogs/_AddExistingToSpaceDialog.pcss
index 98df86871c5..82b5ca7dd40 100644
--- a/res/css/views/dialogs/_AddExistingToSpaceDialog.pcss
+++ b/res/css/views/dialogs/_AddExistingToSpaceDialog.pcss
@@ -225,6 +225,7 @@ limitations under the License.
 .mx_AddExistingToSpace_entry {
     display: flex;
     margin-top: 12px;
+    width: calc(100% - 6px); // 6px for scrollbar
 
     .mx_DecoratedRoomAvatar, /* we can't target .mx_BaseAvatar here as it'll break the decorated avatar styling */
     .mx_BaseAvatar.mx_RoomAvatar_isSpaceRoom {