diff --git a/pkg/zones/machine.go b/pkg/zones/machine.go
index 2e84f6d..9c9fc7f 100644
--- a/pkg/zones/machine.go
+++ b/pkg/zones/machine.go
@@ -9,8 +9,8 @@ import (
 
 // A Machine is a machine on a Zone
 type Machine struct {
-	zone *Zone
-	logger
+	zone   *Zone
+	logger `toml:"-" json:"-" yaml:"-"`
 
 	ID   int    `toml:"id"`
 	Name string `toml:"-" json:"-" yaml:"-"`
diff --git a/pkg/zones/zones.go b/pkg/zones/zones.go
index 3872971..155010c 100644
--- a/pkg/zones/zones.go
+++ b/pkg/zones/zones.go
@@ -87,8 +87,8 @@ func FilterMachines(m MachineIterator, cond func(*Machine) bool) (Machines, int)
 
 // Zone represents one zone in a cluster
 type Zone struct {
-	zones *Zones
-	logger
+	zones  *Zones
+	logger `toml:"-" json:"-" yaml:"-"`
 
 	ID   int    `toml:"id"`
 	Name string `toml:"name"`