diff --git a/phpBB/styles/prosilver/template/mcp_header.html b/phpBB/styles/prosilver/template/mcp_header.html
index 424bb36858..5841c1bbd2 100644
--- a/phpBB/styles/prosilver/template/mcp_header.html
+++ b/phpBB/styles/prosilver/template/mcp_header.html
@@ -8,7 +8,7 @@
 	</p>
 <!-- ENDIF -->
 
-<div id="tabs">
+<div id="tabs" class="tabs">
 	<ul>
 		<!-- BEGIN l_block1 -->
 		<li class="tab<!-- IF l_block1.S_SELECTED --> activetab<!-- ENDIF -->"><a href="{l_block1.U_TITLE}">{l_block1.L_TITLE}</a></li>
diff --git a/phpBB/styles/prosilver/template/ucp_header.html b/phpBB/styles/prosilver/template/ucp_header.html
index de7579999f..98d2eee1a0 100644
--- a/phpBB/styles/prosilver/template/ucp_header.html
+++ b/phpBB/styles/prosilver/template/ucp_header.html
@@ -2,7 +2,7 @@
 
 <h2 class="ucp-title">{L_UCP}</h2>
 
-<div id="tabs">
+<div id="tabs" class="tabs">
 	<ul>
 		<!-- BEGIN t_block1 -->
 		<li class="tab<!-- IF t_block1.S_SELECTED --> activetab<!-- ENDIF -->"><a href="{t_block1.U_TITLE}">{t_block1.L_TITLE}</a></li>
@@ -98,4 +98,4 @@
 
 	</div>
 
-	<div id="cp-main" class="cp main ucp-main panel-container">
+	<div id="cp-main" class="cp-main ucp-main panel-container">