diff --git a/doc/source/api.rst b/doc/source/api.rst
index ab0750ee..0e003fda 100644
--- a/doc/source/api.rst
+++ b/doc/source/api.rst
@@ -8,6 +8,9 @@
 .. automodule:: oslo_cache.exception
    :members:
 
+.. automodule:: oslo_cache.backends.dictionary
+   :members:
+
 .. automodule:: oslo_cache.backends.memcache_pool
    :members:
 
@@ -16,6 +19,3 @@
 
 .. automodule:: oslo_cache.backends.noop
    :members:
-
-.. automodule:: oslo_cache.backends.dictionary
-   :members:
diff --git a/oslo_cache/backends/dictionary.py b/oslo_cache/backends/dictionary.py
index 2c50e47b..a37091b2 100644
--- a/oslo_cache/backends/dictionary.py
+++ b/oslo_cache/backends/dictionary.py
@@ -12,7 +12,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-"""dogpile.cache backend that uses dictionary as a storage"""
+"""dogpile.cache backend that uses dictionary for storage"""
 
 from dogpile.cache import api
 from oslo_utils import timeutils
@@ -32,9 +32,9 @@ class DictCacheBackend(api.CacheBackend):
     Arguments accepted in the arguments dictionary:
 
     :param expiration_time: interval in seconds to indicate maximum
-        time-to-live value. This parameter is common for a single backend
-        instance. Default expiration_time value is 0, that means that all keys
-        have infinite time-to-live value.
+        time-to-live value for each key in DictCacheBackend.
+        Default expiration_time value is 0, that means that all keys have
+        infinite time-to-live value.
     :type expiration_time: real
     """