diff --git a/servefile b/servefile
index a887c64..9fa1779 100755
--- a/servefile
+++ b/servefile
@@ -223,7 +223,7 @@ class FilePutter(BaseHTTPServer.BaseHTTPRequestHandler):
 		except (ValueError, KeyError):
 			pass
 		if length <= 0:
-			self.sendResponse(400, "Content-Length was invalid or not set.")
+			self.sendResponse(411, "Content-Length was invalid or not set.")
 			return -1
 		if length > self.maxUploadSize:
 			self.sendResponse(413, "Your file was too big! Maximum allowed size is %d byte. <a href=\"/\">back</a>" % self.maxUploadSize)