diff --git a/static/css/theme.css b/static/css/theme.css
index e37104665a..ae7da241a0 100644
--- a/static/css/theme.css
+++ b/static/css/theme.css
@@ -448,7 +448,10 @@ article a:active,
 article a:focus,
 article a:hover .copy-to-clipboard,
 article a:active .copy-to-clipboard,
-article a:focus .copy-to-clipboard {
+article a:focus .copy-to-clipboard,
+article a.lightbox-back:hover > img:only-child:empty,
+article a.lightbox-back:active > img:only-child:empty,
+article a.lightbox-back:focus > img:only-child:empty {
     outline: none;
 }
 article a:hover > img:only-child:empty,