diff --git a/moto/ec2/models.py b/moto/ec2/models.py
index e7e8a1dd8..07e218106 100755
--- a/moto/ec2/models.py
+++ b/moto/ec2/models.py
@@ -2,6 +2,8 @@ from __future__ import unicode_literals
 
 import copy
 import itertools
+import json
+import os
 import re
 import six
 
@@ -109,6 +111,9 @@ from .utils import (
     is_tag_filter,
 )
 
+RESOURCES_DIR = os.path.join(os.path.dirname(__file__), 'resources')
+INSTANCE_TYPES = json.load(open(os.path.join(RESOURCES_DIR, 'instance_types.json'), 'r'))
+
 
 def utc_date_and_time():
     return datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%S.000Z')