diff --git a/src/lib/docpad.coffee b/src/lib/docpad.coffee
index 7af56f76..96b0d09c 100755
--- a/src/lib/docpad.coffee
+++ b/src/lib/docpad.coffee
@@ -2547,7 +2547,7 @@ class DocPad extends EventEmitterEnhanced
 
 		# Content Type
 		contentType = document.get('contentTypeRendered') or document.get('contentType')
-		res.contentType(contentType)
+    res.setHeader('Content-Type', contentType);
 
 		# Send
 		dynamic = document.get('dynamic')