diff --git a/web/styles/popovers.css b/web/styles/popovers.css
index 2d522ce39c..3f1357d5cc 100644
--- a/web/styles/popovers.css
+++ b/web/styles/popovers.css
@@ -901,6 +901,11 @@ ul.popover-group-menu-member-list {
         margin: 0;
     }
 
+    .modal_select {
+        width: auto;
+        max-width: 100%;
+    }
+
     #move_topic_to_stream_widget_wrapper {
         display: flex;
         margin-bottom: 10px;
diff --git a/web/styles/zulip.css b/web/styles/zulip.css
index 604fb81add..89ad4b34ca 100644
--- a/web/styles/zulip.css
+++ b/web/styles/zulip.css
@@ -936,11 +936,6 @@ div.focused-message-list {
     outline: none;
 }
 
-#move_topic_modal select {
-    width: auto;
-    max-width: 100%;
-}
-
 .topic_move_breadcrumb_messages {
     margin: 0 5px 5px 0;
     align-self: center;