diff --git a/netrender/master.py b/netrender/master.py
index 65ff358394084f388b852945288caa3b7f3cbbd0..a43ba9a27170ec3d0ee4271bceada89d86b4d0b3 100644
--- a/netrender/master.py
+++ b/netrender/master.py
@@ -252,7 +252,7 @@ class RenderHandler(http.server.BaseHTTPRequestHandler):
     def send_head(self, code = http.client.OK, headers = {}, content = "application/octet-stream"):
         self.send_response(code)
         
-        if code != http.client.OK and content:
+        if code == http.client.OK and content:
             self.send_header("Content-type", content)
 
         for key, value in headers.items():