diff --git a/app/assets/stylesheets/mobile/lightbox.scss b/app/assets/stylesheets/mobile/lightbox.scss
index 198dc51d73..d1ca00bb4e 100644
--- a/app/assets/stylesheets/mobile/lightbox.scss
+++ b/app/assets/stylesheets/mobile/lightbox.scss
@@ -21,5 +21,8 @@
 
   .expand {
     position: initial;
+    filter: invert(100%);
+    float: none;
+    height: 16px;
   }
 }