diff --git libcloud/compute/drivers/gogrid.py libcloud/compute/drivers/gogrid.py
index 6dd059b..bee9082 100644
--- libcloud/compute/drivers/gogrid.py
+++ libcloud/compute/drivers/gogrid.py
@@ -85,7 +85,7 @@ class GoGridNode(Node):
     # so uuid of node should not change after add is completed
     def get_uuid(self):
         return hashlib.sha1(
-            b("%s:%d" % (self.public_ips, self.driver.type))
+            b("%s:%s" % (self.public_ips, self.driver.type))
         ).hexdigest()