diff --git a/app/assets/stylesheets/mobile/topic-list.scss b/app/assets/stylesheets/mobile/topic-list.scss
index a98e53c0a9..07063c59bf 100644
--- a/app/assets/stylesheets/mobile/topic-list.scss
+++ b/app/assets/stylesheets/mobile/topic-list.scss
@@ -103,7 +103,7 @@
     .drop {
       border: 1px solid $primary-low;
       position: absolute;
-      z-index: z("dropdown");
+      z-index: z("dropdown") - 1;
       background-color: $secondary;
       padding: 0 10px 10px 10px;
       width: 150px;