diff --git a/command/build.go b/command/build.go
index d7cf10962..d60c921b5 100644
--- a/command/build.go
+++ b/command/build.go
@@ -113,7 +113,7 @@ func (m *Meta) GetConfig(cla *MetaArgs) (packer.Handler, int) {
 // This is an internal-only method that should be called by commands that don't have
 // a different mode when handling legacy JSON templates; mainly build, validate.
 func DisplayLegacyConfigWarning(ui packersdk.Ui) {
-	if v, ok := os.LookupEnv("PACKER_LEGACY_MODE"); ok && strings.ToLower(v) == "on" {
+	if v := os.Getenv("PACKER_LEGACY_MODE"); strings.ToLower(v) == "on" {
 		return
 	}
 
diff --git a/command/vendored_plugins.go b/command/vendored_plugins.go
index a8328b316..7a18585ef 100644
--- a/command/vendored_plugins.go
+++ b/command/vendored_plugins.go
@@ -194,7 +194,7 @@ func init() {
 	// By default PACKER_LEGACY_MODE=auto to enable automatic loading of vendored plugins.
 	// In preparation for removing vendored plugins entirely we are providing users a flag to
 	//  to control if vendored plugins should be loaded or not.
-	if v, ok := os.LookupEnv("PACKER_LEGACY_MODE"); ok && strings.ToLower(v) == "off" {
+	if v := os.Getenv("PACKER_LEGACY_MODE"); strings.ToLower(v) == "off" {
 		return
 	}