Index: apache-libcloud-2.3.0/libcloud/compute/drivers/ec2.py
===================================================================
--- apache-libcloud-2.3.0.orig/libcloud/compute/drivers/ec2.py
+++ apache-libcloud-2.3.0/libcloud/compute/drivers/ec2.py
@@ -3907,12 +3907,18 @@ class BaseEC2NodeDriver(NodeDriver):
         """
         image = kwargs["image"]
         size = kwargs["size"]
+
+        try:
+            instance_type = size.id
+        except AttributeError:
+            instance_type = size
+
         params = {
             'Action': 'RunInstances',
             'ImageId': image.id,
             'MinCount': str(kwargs.get('ex_mincount', '1')),
             'MaxCount': str(kwargs.get('ex_maxcount', '1')),
-            'InstanceType': size.id
+            'InstanceType': instance_type
         }
 
         if kwargs.get("ex_terminate_on_shutdown", False):