Gensim unpickle error

I'm getting an error when trying to unpickle a gensim model. I pickled the model in 2.7.12 but its being unpickled in 2.7.6. Could that be the issue or is there something simple I'm overlooking

2017-06-18 04:49:41,121: Error running WSGI application
2017-06-18 04:49:41,123: AttributeError: Can't get attribute 'call_on_class_only' on <module 'gensim.utils' from 
2017-06-18 04:49:41,123:   File "/var/www/", line 16, in <module>
2017-06-18 04:49:41,123:     from flask_app import app as application
2017-06-18 04:49:41,124: 
2017-06-18 04:49:41,124:   File "/home/cjh411/rapblog/", line 41, in <module>
2017-06-18 04:49:41,124:     model=pickle.load(open("/home/cjh411/rapblog/test.p",'rb'))

No, it looks like it's the gensim version that's the issue, there. Also, that code's not running in Python 2.7.6, it's running in Python 3.4.