diff --git a/phpBB/styles/prosilver/theme/responsive.css b/phpBB/styles/prosilver/theme/responsive.css
index fcc11f1fc2..ca4054c27f 100644
--- a/phpBB/styles/prosilver/theme/responsive.css
+++ b/phpBB/styles/prosilver/theme/responsive.css
@@ -421,6 +421,7 @@
 	.column1, .column2, .left-box.profile-details {
 		float: none;
 		width: auto;
+		clear: both;
 	}
 
 	/* Polls