diff --git a/control/HTTPResponse.php b/control/HTTPResponse.php
index 6b48a6580..daa5b763e 100755
--- a/control/HTTPResponse.php
+++ b/control/HTTPResponse.php
@@ -81,7 +81,7 @@ class SS_HTTPResponse {
 	 * @var array
 	 */
 	protected $headers = array(
-		"Content-Type" => "text/html; charset=\"utf-8\"",
+		"Content-Type" => "text/html; charset=utf-8",
 	);
 	
 	/**
diff --git a/email/Mailer.php b/email/Mailer.php
index fe7557634..e21f0c492 100644
--- a/email/Mailer.php
+++ b/email/Mailer.php
@@ -66,13 +66,13 @@ function htmlEmail($to, $from, $subject, $htmlContent, $attachedFiles = false, $
 	$subject = "=?UTF-8?B?" . base64_encode($subject) . "?=";
 
 	// Make the plain text part
-	$headers["Content-Type"] = "text/plain; charset=\"utf-8\"";
+	$headers["Content-Type"] = "text/plain; charset=utf-8";
 	$headers["Content-Transfer-Encoding"] = $plainEncoding ? $plainEncoding : "quoted-printable";
 
 	$plainPart = processHeaders($headers, ($plainEncoding == "base64") ? chunk_split(base64_encode($plainContent),60) : wordwrap(QuotedPrintable_encode($plainContent),75));
 
 	// Make the HTML part
-	$headers["Content-Type"] = "text/html; charset=\"utf-8\"";
+	$headers["Content-Type"] = "text/html; charset=utf-8";
         
 	
 	// Add basic wrapper tags if the body tag hasn't been given
@@ -179,7 +179,7 @@ function plaintextEmail($to, $from, $subject, $plainContent, $attachedFiles, $cu
 	$subject = "=?UTF-8?B?" . base64_encode($subject) . "?=";
 
 	// Make the plain text part
-	$headers["Content-Type"] = "text/plain; charset=\"utf-8\"";
+	$headers["Content-Type"] = "text/plain; charset=utf-8";
 	$headers["Content-Transfer-Encoding"] = $plainEncoding ? $plainEncoding : "quoted-printable";
 
 	$plainContent = ($plainEncoding == "base64") ? chunk_split(base64_encode($plainContent),60) : QuotedPrintable_encode($plainContent);
@@ -284,7 +284,7 @@ function wrapImagesInline($htmlContent) {
 	
 	
 	// Make the HTML part
-	$headers["Content-Type"] = "text/html; charset=\"utf-8\"";
+	$headers["Content-Type"] = "text/html; charset=utf-8";
 	$headers["Content-Transfer-Encoding"] = "quoted-printable";
 	$multiparts[] = processHeaders($headers, QuotedPrintable_encode($replacedContent));