diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 3bb3266528..aae147af4f 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -3565,6 +3565,7 @@ function msg_handler($errno, $msg_text, $errfile, $errline)
 			echo '	<div id="page-header">';
 			echo '		' . $l_return_index;
 			echo '	</div>';
+			echo '	<div id="acp">';
 			echo '	<div class="panel">';
 			echo '		<div id="content">';
 			echo '			<h1>' . $msg_title . '</h1>';
@@ -3575,6 +3576,7 @@ function msg_handler($errno, $msg_text, $errfile, $errline)
 
 			echo '		</div>';
 			echo '	</div>';
+			echo '	</div>';
 			echo '	<div id="page-footer">';
 			echo '		Powered by phpBB &copy; ' . date('Y') . ' <a href="http://www.phpbb.com/">phpBB Group</a>';
 			echo '	</div>';
diff --git a/phpBB/install/index.php b/phpBB/install/index.php
index db6535c9f8..043832a587 100755
--- a/phpBB/install/index.php
+++ b/phpBB/install/index.php
@@ -554,6 +554,7 @@ class module
 		echo '	<div id="page-header">';
 		echo '	</div>';
 		echo '	<div id="page-body">';
+		echo '		<div id="acp">
 		echo '		<div class="panel">';
 		echo '			<span class="corners-top"><span></span></span>';
 		echo '			<div id="content">';
@@ -564,6 +565,7 @@ class module
 		echo '			</div>';
 		echo '			<span class="corners-bottom"><span></span></span>';
 		echo '		</div>';
+		echo '		</div>';
 		echo '	</div>';
 		echo '	<div id="page-footer">';
 		echo '		Powered by phpBB &copy; ' . date('Y') . ' <a href="http://www.phpbb.com/">phpBB Group</a>';