diff --git a/src/static_src/scss/_room.scss b/src/static_src/scss/_room.scss
index eeaf2e9..cdc4475 100644
--- a/src/static_src/scss/_room.scss
+++ b/src/static_src/scss/_room.scss
@@ -311,6 +311,9 @@ html.sea-open .room-aperture.is-scrollable {
             flex: 1;
             min-height: 0;
             overflow-y: auto;
+            display: flex;
+            flex-direction: column;
+            justify-content: flex-end;   // bottom-anchor short threads
 
             .post-line {
                 display: grid;