diff --git a/django/core/handlers/modpython.py b/django/core/handlers/modpython.py
index d407476acf..58699816fd 100644
--- a/django/core/handlers/modpython.py
+++ b/django/core/handlers/modpython.py
@@ -31,6 +31,11 @@ class ModPythonRequest(http.HttpRequest):
             self.path_info = force_unicode(req.uri[len(root):])
         else:
             self.path_info = self.path
+        if not self.path_info:
+            # Django prefers empty paths to be '/', rather than '', to give us
+            # a common start character for URL patterns. So this is a little
+            # naughty, but also pretty harmless.
+            self.path_info = u'/'
 
     def __repr__(self):
         # Since this is called as part of error handling, we need to be very
diff --git a/django/core/handlers/wsgi.py b/django/core/handlers/wsgi.py
index ca8dd4565f..a1324936cd 100644
--- a/django/core/handlers/wsgi.py
+++ b/django/core/handlers/wsgi.py
@@ -76,7 +76,13 @@ def safe_copyfileobj(fsrc, fdst, length=16*1024, size=0):
 class WSGIRequest(http.HttpRequest):
     def __init__(self, environ):
         script_name = base.get_script_name(environ)
-        path_info = force_unicode(environ.get('PATH_INFO', '/'))
+        path_info = force_unicode(environ.get('PATH_INFO', u'/'))
+        if not path_info:
+            # Sometimes PATH_INFO exists, but is empty (e.g. accessing
+            # the SCRIPT_NAME URL without a trailing slash). We really need to
+            # operate as if they'd requested '/'. Not amazingly nice to force
+            # the path like this, but should be harmless.
+            path_info = u'/'
         self.environ = environ
         self.path_info = path_info
         self.path = '%s%s' % (script_name, path_info)