diff --git a/k4ever/api2/decorators.py b/k4ever/api2/decorators.py
index a124f05..496e7ad 100644
--- a/k4ever/api2/decorators.py
+++ b/k4ever/api2/decorators.py
@@ -88,11 +88,12 @@ def requirePlugin(apiFunc):
 def fix_mime(mime_func):
 	""" Fix mimetype by truncating everything behind a ';'. 
 	
-	This is used to fix pistons ``piston.utils.Mimer.loader_for_type``."""
+	This is used to fix pistons ``piston.utils.Mimer.content_type``."""
 	@wraps(mime_func)
-	def wrapper(self, ctype):
+	def wrapper(self):
+		ctype = self.request.META.get('CONTENT_TYPE', None)
 		if ctype and ctype.find(";") >= 0:
-			ctype = ctype.split(";")[0]
-		return mime_func(self, ctype)
+			ctype = self.request.META['CONTENT_TYPE'] = ctype.split(";")[0]
+		return mime_func(self)
 	return wrapper
 
diff --git a/k4ever/api2/urls.py b/k4ever/api2/urls.py
index ae60471..163bb65 100644
--- a/k4ever/api2/urls.py
+++ b/k4ever/api2/urls.py
@@ -6,17 +6,17 @@ from api2.handlers import *
 from api2.decorators import fix_mime
 import piston.utils
 
-# piston does not understand mimetypes with charsets, HACK: fix loader_for_type
-piston.utils.Mimer.loader_for_type = fix_mime(piston.utils.Mimer.loader_for_type)
+# piston does not understand mimetypes with charsets, HACK: fix content_type
+piston.utils.Mimer.content_type = fix_mime(piston.utils.Mimer.content_type)
 
-class CsrfExemptResource( Resource ):
+class CsrfExemptResource(Resource):
 	""" Except a :class:`Resource` from djangos CSRF-Framework.
 
 		This idea is taken from
 		http://www.robertshady.com/content/creating-very-basic-api-using-python-django-and-piston
 	"""
 	
-	def __init__( self, handler, authentication = None ):
+	def __init__(self, handler, authentication = None):
 		super( CsrfExemptResource, self ).__init__( handler, authentication )
 		self.csrf_exempt = getattr( self.handler, 'csrf_exempt', True )