diff --git a/app/assets/stylesheets/common/base/compose.scss b/app/assets/stylesheets/common/base/compose.scss
index 491a4044dfe..2fbb1cc73a9 100644
--- a/app/assets/stylesheets/common/base/compose.scss
+++ b/app/assets/stylesheets/common/base/compose.scss
@@ -405,6 +405,7 @@ div.ac-wrap {
     box-shadow: none;
     border: 0;
     margin: 0;
+    background: transparent;
   }
 }