diff --git a/cmd/cmd_dnshelp.go b/cmd/cmd_dnshelp.go
index 9d531d6d..c2dfc164 100644
--- a/cmd/cmd_dnshelp.go
+++ b/cmd/cmd_dnshelp.go
@@ -51,7 +51,7 @@ Here is an example bash command using the CloudFlare DNS provider:
 	fmt.Fprintln(w, "\tfastdns:\tAKAMAI_HOST, AKAMAI_CLIENT_TOKEN, AKAMAI_CLIENT_SECRET, AKAMAI_ACCESS_TOKEN")
 	fmt.Fprintln(w, "\tgandi:\tGANDI_API_KEY")
 	fmt.Fprintln(w, "\tgandiv5:\tGANDIV5_API_KEY")
-	fmt.Fprintln(w, "\tgcloud:\tGCE_PROJECT, GCE_SERVICE_ACCOUNT_FILE")
+	fmt.Fprintln(w, "\tgcloud:\tGCE_PROJECT, 'Application Default Credentials', [GCE_SERVICE_ACCOUNT_FILE]")
 	fmt.Fprintln(w, "\tglesys:\tGLESYS_API_USER, GLESYS_API_KEY")
 	fmt.Fprintln(w, "\tgodaddy:\tGODADDY_API_KEY, GODADDY_API_SECRET")
 	fmt.Fprintln(w, "\thostingde:\tHOSTINGDE_API_KEY, HOSTINGDE_ZONE_NAME")
diff --git a/providers/dns/gcloud/googlecloud.go b/providers/dns/gcloud/googlecloud.go
index 3efd4a25..d2cd04f4 100644
--- a/providers/dns/gcloud/googlecloud.go
+++ b/providers/dns/gcloud/googlecloud.go
@@ -61,7 +61,7 @@ func NewDNSProvider() (*DNSProvider, error) {
 	}
 
 	// Use default credentials.
-	project := os.Getenv("GCE_PROJECT")
+	project := env.GetOrDefaultString("GCE_PROJECT", "")
 	return NewDNSProviderCredentials(project)
 }
 
@@ -98,7 +98,7 @@ func NewDNSProviderServiceAccount(saFile string) (*DNSProvider, error) {
 
 	// If GCE_PROJECT is non-empty it overrides the project in the service
 	// account file.
-	project := os.Getenv("GCE_PROJECT")
+	project := env.GetOrDefaultString("GCE_PROJECT", "")
 	if project == "" {
 		// read project id from service account file
 		var datJSON struct {