--- a/roundup/backends/sessions_dbm.py	Wed Jan 06 16:02:34 2016 +1100
+++ b/roundup/backends/sessions_dbm.py	Fri Feb 13 00:20:43 2015 +1100
@@ -11,7 +11,8 @@
 from cgi import escape
 from roundup import hyperdb
 from roundup.i18n import _
-from roundup.anypy.dbm_ import anydbm, whichdb, key_in
+from roundup.anypy.dbm_ import anydbm, whichdb
+
 
 class BasicDatabase:
     ''' Provide a nice encapsulation of an anydbm store.
@@ -28,7 +29,7 @@
     def exists(self, infoid):
         db = self.opendb('c')
         try:
-            return key_in(db, infoid)
+            return infoid in db
         finally:
             db.close()
 
@@ -57,10 +58,11 @@
         self.__class__._db_type = db_type
 
     _marker = []
+
     def get(self, infoid, value, default=_marker):
         db = self.opendb('c')
         try:
-            if key_in(db, infoid):
+            if infoid in db:
                 values = marshal.loads(db[infoid])
             else:
                 if default != self._marker:
@@ -85,7 +87,7 @@
     def set(self, infoid, **newvalues):
         db = self.opendb('c')
         try:
-            if key_in(db, infoid):
+            if infoid in db:
                 values = marshal.loads(db[infoid])
             else:
                 values = {'__timestamp': time.time()}
@@ -104,7 +106,7 @@
     def destroy(self, infoid):
         db = self.opendb('c')
         try:
-            if key_in(db, infoid):
+            if infoid in db:
                 del db[infoid]
         finally:
             db.close()