diff --git a/src/market_mad/remotes/s3/monitor b/src/market_mad/remotes/s3/monitor
index 5eabcca56c..355a65b487 100755
--- a/src/market_mad/remotes/s3/monitor
+++ b/src/market_mad/remotes/s3/monitor
@@ -78,7 +78,7 @@ access_key_id     = xpath(xml, 'MARKETPLACE/TEMPLATE/ACCESS_KEY_ID')
 secret_access_key = xpath(xml, 'MARKETPLACE/TEMPLATE/SECRET_ACCESS_KEY')
 bucket            = xpath(xml, 'MARKETPLACE/TEMPLATE/BUCKET')
 region            = xpath(xml, 'MARKETPLACE/TEMPLATE/REGION')
-total_mb          = xpath(xml, 'MARKETPLACE/TEMPLATE/TOTAL_MB') || TOTAL_MB_DEFAULT
+total_mb          = xpath(xml, 'MARKETPLACE/TEMPLATE/TOTAL_MB').to_i || TOTAL_MB_DEFAULT
 
 # optional
 signature_version = xpath(xml, 'MARKETPLACE/TEMPLATE/SIGNATURE_VERSION')