diff --git a/builder/googlecompute/config.go b/builder/googlecompute/config.go
index 743e4745c..69d223a75 100644
--- a/builder/googlecompute/config.go
+++ b/builder/googlecompute/config.go
@@ -47,7 +47,7 @@ type Config struct {
 
 func NewConfig(raws ...interface{}) (*Config, []string, error) {
 	c := new(Config)
-	err := config.Decode(&c, &config.DecodeOpts{
+	err := config.Decode(c, &config.DecodeOpts{
 		Interpolate: true,
 		InterpolateFilter: &interpolate.RenderFilter{
 			Exclude: []string{
diff --git a/builder/null/config.go b/builder/null/config.go
index 7665aec51..9ccc32282 100644
--- a/builder/null/config.go
+++ b/builder/null/config.go
@@ -21,7 +21,7 @@ type Config struct {
 func NewConfig(raws ...interface{}) (*Config, []string, error) {
 	c := new(Config)
 
-	err := config.Decode(&c, &config.DecodeOpts{
+	err := config.Decode(c, &config.DecodeOpts{
 		Interpolate: true,
 		InterpolateFilter: &interpolate.RenderFilter{
 			Exclude: []string{
diff --git a/builder/parallels/pvm/config.go b/builder/parallels/pvm/config.go
index c3fab4446..8f6d9a915 100644
--- a/builder/parallels/pvm/config.go
+++ b/builder/parallels/pvm/config.go
@@ -33,7 +33,7 @@ type Config struct {
 
 func NewConfig(raws ...interface{}) (*Config, []string, error) {
 	c := new(Config)
-	err := config.Decode(&c, &config.DecodeOpts{
+	err := config.Decode(c, &config.DecodeOpts{
 		Interpolate: true,
 		InterpolateFilter: &interpolate.RenderFilter{
 			Exclude: []string{