diff --git a/collector/slave_hosts.go b/collector/slave_hosts.go
index 27af73d1..f8df806f 100644
--- a/collector/slave_hosts.go
+++ b/collector/slave_hosts.go
@@ -27,16 +27,16 @@ import (
 const (
 	// slavehosts is the Metric subsystem we use.
 	slavehosts = "slave_hosts"
+)
+
+// Metric descriptors.
+var (
 	// heartbeatQuery is the query used to fetch the stored and current
 	// timestamps. %s will be replaced by the database and table name.
 	// The second column allows gets the server timestamp at the exact same
 	// time the query is run.
 	slaveHostsQueries = [2]string{"SHOW SLAVE HOSTS", "SHOW REPLICAS"}
-)
-
-// Metric descriptors.
-var (
-	SlaveHostsInfo = prometheus.NewDesc(
+	SlaveHostsInfo    = prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, heartbeat, "mysql_slave_hosts_info"),
 		"Information about running slaves",
 		[]string{"server_id", "slave_host", "port", "master_id", "slave_uuid"}, nil,