diff --git a/command/agent/command.go b/command/agent/command.go
index cbac0af33..34b1edd14 100644
--- a/command/agent/command.go
+++ b/command/agent/command.go
@@ -442,50 +442,6 @@ func (c *Command) readConfig() *Config {
 	return config
 }
 
-// verifyUniqueListeners checks to see if an address was used more than once in
-// the config
-func (c *Config) verifyUniqueListeners() error {
-	listeners := []struct {
-		host  string
-		port  int
-		descr string
-	}{
-		{c.Addresses.DNS, c.Ports.DNS, "DNS"},
-		{c.Addresses.HTTP, c.Ports.HTTP, "HTTP"},
-		{c.Addresses.HTTPS, c.Ports.HTTPS, "HTTPS"},
-		{c.AdvertiseAddr, c.Ports.Server, "Server RPC"},
-		{c.AdvertiseAddr, c.Ports.SerfLan, "Serf LAN"},
-		{c.AdvertiseAddr, c.Ports.SerfWan, "Serf WAN"},
-	}
-
-	type key struct {
-		host string
-		port int
-	}
-	m := make(map[key]string, len(listeners))
-
-	for _, l := range listeners {
-		if l.host == "" {
-			l.host = "0.0.0.0"
-		} else if strings.HasPrefix(l.host, "unix") {
-			// Don't compare ports on unix sockets
-			l.port = 0
-		}
-		if l.host == "0.0.0.0" && l.port <= 0 {
-			continue
-		}
-
-		k := key{l.host, l.port}
-		v, ok := m[k]
-		if ok {
-			return fmt.Errorf("%s address already configured for %s", l.descr, v)
-		}
-		m[k] = l.descr
-	}
-	return nil
-}
-
-// discoverEc2Hosts searches an AWS region, returning a list of instance ips
 // where EC2TagKey = EC2TagValue
 func (c *Config) discoverEc2Hosts(logger *log.Logger) ([]string, error) {
 	config := c.RetryJoinEC2
diff --git a/command/agent/config.go b/command/agent/config.go
index cbb355b58..aea7d685f 100644
--- a/command/agent/config.go
+++ b/command/agent/config.go
@@ -931,6 +931,49 @@ func (c *Config) GetTokenForAgent() string {
 	return ""
 }
 
+// verifyUniqueListeners checks to see if an address was used more than once in
+// the config
+func (c *Config) verifyUniqueListeners() error {
+	listeners := []struct {
+		host  string
+		port  int
+		descr string
+	}{
+		{c.Addresses.DNS, c.Ports.DNS, "DNS"},
+		{c.Addresses.HTTP, c.Ports.HTTP, "HTTP"},
+		{c.Addresses.HTTPS, c.Ports.HTTPS, "HTTPS"},
+		{c.AdvertiseAddr, c.Ports.Server, "Server RPC"},
+		{c.AdvertiseAddr, c.Ports.SerfLan, "Serf LAN"},
+		{c.AdvertiseAddr, c.Ports.SerfWan, "Serf WAN"},
+	}
+
+	type key struct {
+		host string
+		port int
+	}
+	m := make(map[key]string, len(listeners))
+
+	for _, l := range listeners {
+		if l.host == "" {
+			l.host = "0.0.0.0"
+		} else if strings.HasPrefix(l.host, "unix") {
+			// Don't compare ports on unix sockets
+			l.port = 0
+		}
+		if l.host == "0.0.0.0" && l.port <= 0 {
+			continue
+		}
+
+		k := key{l.host, l.port}
+		v, ok := m[k]
+		if ok {
+			return fmt.Errorf("%s address already configured for %s", l.descr, v)
+		}
+		m[k] = l.descr
+	}
+	return nil
+}
+
 // DecodeConfig reads the configuration from the given reader in JSON
 // format and decodes it into a proper Config structure.
 func DecodeConfig(r io.Reader) (*Config, error) {