diff --git a/rolepermissions/decorators.py b/rolepermissions/decorators.py
index 998cc51..3780c18 100644
--- a/rolepermissions/decorators.py
+++ b/rolepermissions/decorators.py
@@ -7,6 +7,7 @@
 from django.core.exceptions import PermissionDenied
 
 from rolepermissions.checkers import has_role, has_permission
+from rolepermissions.utils import user_is_authenticated
 
 
 def has_role_decorator(role):
@@ -14,7 +15,7 @@ def request_decorator(dispatch):
         @wraps(dispatch)
         def wrapper(request, *args, **kwargs):
             user = request.user
-            if user.is_authenticated():
+            if user_is_authenticated(user):
                 if has_role(user, role):
                     return dispatch(request, *args, **kwargs)
             if hasattr(settings, 'ROLEPERMISSIONS_REDIRECT_TO_LOGIN'):
@@ -29,7 +30,7 @@ def request_decorator(dispatch):
         @wraps(dispatch)
         def wrapper(request, *args, **kwargs):
             user = request.user
-            if user.is_authenticated():
+            if user_is_authenticated(user):
                 if has_permission(user, permission_name):
                     return dispatch(request, *args, **kwargs)
             if hasattr(settings, 'ROLEPERMISSIONS_REDIRECT_TO_LOGIN'):
diff --git a/rolepermissions/utils.py b/rolepermissions/utils.py
index 61c7a52..dde3bd4 100644
--- a/rolepermissions/utils.py
+++ b/rolepermissions/utils.py
@@ -1,10 +1,20 @@
 from __future__ import unicode_literals
 
 import re
+import collections
+
+
+def user_is_authenticated(user):
+    if isinstance(user.is_authenticated, collections.Callable):
+        authenticated = user.is_authenticated()
+    else:
+        authenticated = user.is_authenticated
+
+    return authenticated
 
 
 def camelToSnake(s):
-    """ 
+    """
     https://gist.github.com/jaytaylor/3660565
     Is it ironic that this function is written in camel case, yet it
     converts to snake case? hmm..