diff --git a/contrib/inventory/ec2.py b/contrib/inventory/ec2.py
index 060c5e6424..8cb099a9d3 100755
--- a/contrib/inventory/ec2.py
+++ b/contrib/inventory/ec2.py
@@ -440,6 +440,7 @@ class Ec2Inventory(object):
             'group_by_ami_id',
             'group_by_instance_type',
             'group_by_instance_state',
+            'group_by_platform',
             'group_by_key_pair',
             'group_by_vpc_id',
             'group_by_security_group',