diff --git a/htdocs/theme/eldy/style.css.php b/htdocs/theme/eldy/style.css.php
index d0fed74c7d0..f1287b1b637 100644
--- a/htdocs/theme/eldy/style.css.php
+++ b/htdocs/theme/eldy/style.css.php
@@ -1891,6 +1891,7 @@ div.tabBar {
 }
 div.popuptabset {
 	padding: 6px;
+	background: #fff;
 	border: 1px solid #888;
 }
 div.popuptab {
diff --git a/htdocs/theme/md/style.css.php b/htdocs/theme/md/style.css.php
index a9726641c58..3588877adba 100644
--- a/htdocs/theme/md/style.css.php
+++ b/htdocs/theme/md/style.css.php
@@ -1903,6 +1903,7 @@ div.tabsAction > a {
 
 div.popuptabset {
 	padding: 6px;
+	background: #fff;
 	border: 1px solid #888;
 }
 div.popuptab {