diff --git a/management/backup.py b/management/backup.py
index c2ef7676..6528c71d 100755
--- a/management/backup.py
+++ b/management/backup.py
@@ -511,10 +511,15 @@ def list_target_files(config):
 
 		# connect to the region & bucket
 		try:
-			s3 = boto3.client('s3', \
-				endpoint_url=f'https://{target.hostname}', \
-				aws_access_key_id=config['target_user'], \
-				aws_secret_access_key=config['target_pass'])
+			if (config['target_user'] == '') and (config['target_pass'] == ''):
+				## User did not specify an S3 Access Key, nor a S3 Secret Access Key. Perhaps using EC2 instance role?
+				s3 = boto3.client('s3', \
+				endpoint_url=f'https://{target.hostname}')
+			else:
+				s3 = boto3.client('s3', \
+					endpoint_url=f'https://{target.hostname}', \
+					aws_access_key_id=config['target_user'], \
+					aws_secret_access_key=config['target_pass'])
 			bucket_objects = s3.list_objects_v2(Bucket=bucket, Prefix=path)['Contents']
 			backup_list = [(key['Key'][len(path):], key['Size']) for key in bucket_objects]
 		except ClientError as e: