diff --git a/aws/misc/stack_power.py b/aws/misc/stack_power.py
index 6eedda3e25cf8d..3a392973daaf60 100755
--- a/aws/misc/stack_power.py
+++ b/aws/misc/stack_power.py
@@ -105,7 +105,8 @@ def auto_scaling_group(args):
     for group in res['AutoScalingGroups']:
         # parse group's tags
         tags = {tag['Key']: tag['Value'] for tag in group['Tags']}
-        if tags['StackName'] != args.stack_name:
+        stackName = tags.get('StackName')
+        if not stackName or stackName != args.stack_name:
             print('Skipping ASG', group['AutoScalingGroupName'])
             continue
         if args.power_on: