diff --git a/django/middleware/csrf.py b/django/middleware/csrf.py
index 305b20e1c4..c9e8d73c82 100644
--- a/django/middleware/csrf.py
+++ b/django/middleware/csrf.py
@@ -105,7 +105,7 @@ class CsrfViewMiddleware(object):
         if getattr(callback, 'csrf_exempt', False):
             return None
 
-        # Assume that anything not defined as 'safe' by RC2616 needs protection
+        # Assume that anything not defined as 'safe' by RFC2616 needs protection
         if request.method not in ('GET', 'HEAD', 'OPTIONS', 'TRACE'):
             if getattr(request, '_dont_enforce_csrf_checks', False):
                 # Mechanism to turn off CSRF checks for test suite.