diff --git a/core/Tracker.php b/core/Tracker.php
index 67e12a057bf274455f1982c6b2cb3088b4bc4368..5255492734d7a6fa254b2847c40fcadb2d26c315 100644
--- a/core/Tracker.php
+++ b/core/Tracker.php
@@ -855,7 +855,7 @@ function Piwik_Tracker_ExitWithException($e, $authenticated = false)
 	
 	if(isset($GLOBALS['PIWIK_TRACKER_DEBUG']) && $GLOBALS['PIWIK_TRACKER_DEBUG'])
 	{
-		$trailer = '<font color="#888888">Backtrace:<br /><pre>'.$e->getTraceAsString().'</pre></font>';
+		$trailer = '<span style="color: #888888">Backtrace:<br /><pre>'.$e->getTraceAsString().'</pre></span>';
 		$headerPage = file_get_contents(PIWIK_INCLUDE_PATH . '/themes/default/simple_structure_header.tpl');
 		$footerPage = file_get_contents(PIWIK_INCLUDE_PATH . '/themes/default/simple_structure_footer.tpl');
 		$headerPage = str_replace('{$HTML_TITLE}', 'Piwik &rsaquo; Error', $headerPage);
diff --git a/core/testMinimumPhpVersion.php b/core/testMinimumPhpVersion.php
index c2c3b2a66b84025a80cdfa505515d95bb1c1baaf..508602e5d0bf2babe01a47f4750a83639909843f 100644
--- a/core/testMinimumPhpVersion.php
+++ b/core/testMinimumPhpVersion.php
@@ -74,7 +74,7 @@ if(!function_exists('Piwik_ExitWithMessage')) {
         @header('Content-Type: text/html; charset=utf-8');
         if($optionalTrace)
         {
-            $optionalTrace = '<font color="#888888">Backtrace:<br /><pre>'.$optionalTrace.'</pre></font>';
+            $optionalTrace = '<span style="color:#888888">Backtrace:<br /><pre>'.$optionalTrace.'</pre></span>';
         }
         if($optionalLinks)
         {