diff --git a/ecs/convert.go b/ecs/convert.go
index 865ffff25..84e51e258 100644
--- a/ecs/convert.go
+++ b/ecs/convert.go
@@ -389,6 +389,9 @@ func getConfiguredLimits(service types.ServiceConfig) (types.UnitBytes, int64, e
 	}
 
 	limits := service.Deploy.Resources.Limits
+	if limits == nil {
+		limits = service.Deploy.Resources.Reservations
+	}
 	if limits == nil {
 		return 0, 0, nil
 	}