diff --git a/scrapy/conf/default_settings.py b/scrapy/conf/default_settings.py
index 59947f79f..6402c76f5 100644
--- a/scrapy/conf/default_settings.py
+++ b/scrapy/conf/default_settings.py
@@ -126,8 +126,6 @@ MAIL_FROM = 'scrapy@localhost'
 MEMDEBUG_ENABLED = False        # enable memory debugging
 MEMDEBUG_NOTIFY = []            # send memory debugging report by mail at engine shutdown
 
-MEMORYSTORE = 'scrapy.core.scheduler.MemoryStore'
-
 MEMUSAGE_ENABLED = 1
 MEMUSAGE_LIMIT_MB = 0
 MEMUSAGE_NOTIFY_MAIL = []
diff --git a/scrapy/core/scheduler/store.py b/scrapy/contrib_exp/history/memorystore.py
similarity index 100%
rename from scrapy/core/scheduler/store.py
rename to scrapy/contrib_exp/history/memorystore.py
diff --git a/scrapy/contrib_exp/history/middleware.py b/scrapy/contrib_exp/history/middleware.py
index 4baf3767f..b1771e96b 100644
--- a/scrapy/contrib_exp/history/middleware.py
+++ b/scrapy/contrib_exp/history/middleware.py
@@ -15,8 +15,10 @@ class HistoryMiddleware(object):
     # How often we should process pages that have not changed (need to include depth)
     MIN_PROCESS_UNCHANGED_DAYS = 12
 
+    MEMORYSTORE = 'scrapy.contrib_exp.history.memorystore.MemoryStore'
+
     def __init__(self):
-        historycls = load_object(settings['MEMORYSTORE'])
+        historycls = load_object(self.MEMORYSTORE)
         if not historycls:
             raise NotConfigured
         self.historydata = historycls()
diff --git a/scrapy/contrib_exp/history/store.py b/scrapy/contrib_exp/history/sqlstore.py
similarity index 100%
rename from scrapy/contrib_exp/history/store.py
rename to scrapy/contrib_exp/history/sqlstore.py
diff --git a/scrapy/core/scheduler/__init__.py b/scrapy/core/scheduler/__init__.py
index 51f8ecab5..5f28c6bf3 100644
--- a/scrapy/core/scheduler/__init__.py
+++ b/scrapy/core/scheduler/__init__.py
@@ -1,3 +1,2 @@
 from scrapy.core.scheduler.schedulers import Scheduler
-from scrapy.core.scheduler.store import MemoryStore
 from scrapy.core.scheduler.middleware import SchedulerMiddlewareManager