diff --git a/daemon/config.go b/daemon/config.go
index 9e8d08e2a6..ddb6040bff 100644
--- a/daemon/config.go
+++ b/daemon/config.go
@@ -70,7 +70,7 @@ func (config *Config) InstallFlags() {
 	opts.MirrorListVar(&config.Mirrors, []string{"-registry-mirror"}, "Specify a preferred Docker registry mirror")
 }
 
-func GetDefaultNetworkMtu() int {
+func getDefaultNetworkMtu() int {
 	if iface, err := networkdriver.GetDefaultRouteIface(); err == nil {
 		return iface.MTU
 	}
diff --git a/daemon/daemon.go b/daemon/daemon.go
index 084d779033..b0feae917b 100644
--- a/daemon/daemon.go
+++ b/daemon/daemon.go
@@ -721,8 +721,7 @@ func NewDaemon(config *Config, eng *engine.Engine) (*Daemon, error) {
 func NewDaemonFromDirectory(config *Config, eng *engine.Engine) (*Daemon, error) {
 	// Apply configuration defaults
 	if config.Mtu == 0 {
-		// FIXME: GetDefaultNetwork Mtu doesn't need to be public anymore
-		config.Mtu = GetDefaultNetworkMtu()
+		config.Mtu = getDefaultNetworkMtu()
 	}
 	// Check for mutually incompatible config options
 	if config.BridgeIface != "" && config.BridgeIP != "" {
diff --git a/integration/utils_test.go b/integration/utils_test.go
index 1d6e3ec609..da20de586c 100644
--- a/integration/utils_test.go
+++ b/integration/utils_test.go
@@ -37,10 +37,6 @@ type Fataler interface {
 func mkDaemon(f Fataler) *daemon.Daemon {
 	eng := newTestEngine(f, false, "")
 	return mkDaemonFromEngine(eng, f)
-	// FIXME:
-	// [...]
-	// Mtu:         docker.GetDefaultNetworkMtu(),
-	// [...]
 }
 
 func createNamedTestContainer(eng *engine.Engine, config *runconfig.Config, f Fataler, name string) (shortId string) {