diff --git a/flask/config.py b/flask/config.py
index bb32f7a7b6..6d7e868318 100644
--- a/flask/config.py
+++ b/flask/config.py
@@ -213,7 +213,7 @@ def from_mapping(self, *mapping, **kwargs):
                     self[key] = value
         return True
 
-    def get_namespace(self, namespace, lowercase=True):
+    def get_namespace(self, namespace, lowercase=True, trim_namespace=True):
         """Returns a dictionary containing a subset of configuration options
         that match the specified namespace/prefix. Example usage::
 
@@ -236,6 +236,8 @@ def get_namespace(self, namespace, lowercase=True):
         :param namespace: a configuration namespace
         :param lowercase: a flag indicating if the keys of the resulting
                           dictionary should be lowercase
+        :param trim_namespace: a flag indicating if the keys of the resulting
+                          dictionary should not include the namespace
 
         .. versionadded:: 1.0
         """
@@ -243,7 +245,10 @@ def get_namespace(self, namespace, lowercase=True):
         for k, v in iteritems(self):
             if not k.startswith(namespace):
                 continue
-            key = k[len(namespace):]
+            if trim_namespace:
+                key = k[len(namespace):]
+            else:
+                key = k
             if lowercase:
                 key = key.lower()
             rv[key] = v
diff --git a/tests/test_config.py b/tests/test_config.py
index 7487cb1d78..edfe43ccaf 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -182,3 +182,11 @@ def test_get_namespace():
     assert 2 == len(bar_options)
     assert 'bar stuff 1' == bar_options['STUFF_1']
     assert 'bar stuff 2' == bar_options['STUFF_2']
+    foo_options = app.config.get_namespace('FOO_', trim_namespace=False)
+    assert 2 == len(foo_options)
+    assert 'foo option 1' == foo_options['foo_option_1']
+    assert 'foo option 2' == foo_options['foo_option_2']
+    bar_options = app.config.get_namespace('BAR_', lowercase=False, trim_namespace=False)
+    assert 2 == len(bar_options)
+    assert 'bar stuff 1' == bar_options['BAR_STUFF_1']
+    assert 'bar stuff 2' == bar_options['BAR_STUFF_2']