diff --git a/lib/sessionmanager.js b/lib/sessionmanager.js
index 0fdbd8bd..54818650 100644
--- a/lib/sessionmanager.js
+++ b/lib/sessionmanager.js
@@ -4,7 +4,7 @@ function SessionManager(options, serializeUser) {
     options = undefined;
   }
   options = options || {};
-  
+
   this._key = options.key || 'passport';
   this._serializeUser = serializeUser;
 }
@@ -23,7 +23,16 @@ SessionManager.prototype.logIn = function(req, user, cb) {
       req.session = {};
     }
     req.session[self._key] = req._passport.session;
-    cb();
+    if (typeof req.session.save == 'function') {
+      req.session.save(function (err) {
+        if (err) {
+          return cb(err);
+        }
+        cb();
+      });
+    } else {
+      cb();
+    }
   });
 }