diff --git a/phpBB/styles/prosilver/theme/responsive.css b/phpBB/styles/prosilver/theme/responsive.css
index a64ee82d1b..c8048a78d1 100644
--- a/phpBB/styles/prosilver/theme/responsive.css
+++ b/phpBB/styles/prosilver/theme/responsive.css
@@ -521,7 +521,7 @@ fieldset.display-actions {
 		margin-bottom: 5px;
 	}
 
-	action-bar > div {
+	.action-bar > div {
 		margin-bottom: 5px;
  	}