diff --git a/src/plugins/mixpanel.ts b/src/plugins/mixpanel.ts
index f5cbbcf33..256e1334a 100644
--- a/src/plugins/mixpanel.ts
+++ b/src/plugins/mixpanel.ts
@@ -97,6 +97,9 @@ export class Mixpanel {
   static get people(): MixpanelPeople {return mixpanel.people; };
 
 }
+/**
+ * @private
+ */
 export declare class MixpanelPeople {
   static identify(distinctId: string, onSuccess?: Function, onFail?: Function): void;
   static increment(peopleProperties: any, onSuccess?: Function, onFail?: Function): void;
diff --git a/src/plugins/nfc.ts b/src/plugins/nfc.ts
index 04d847c15..809dea96e 100644
--- a/src/plugins/nfc.ts
+++ b/src/plugins/nfc.ts
@@ -152,10 +152,12 @@ export class NFC {
   static enabled(): Promise<any> {return; }
 
 }
-
+/**
+ * @private
+ */
 export declare class Ndef {
-  uriRecord(uri: string): any;
-  textRecord(text: string): any;
-  mimeMediaRecord(mimeType: string, payload: string): any;
-  androidApplicationRecord(packageName: string): any;
+  static uriRecord(uri: string): any;
+  static textRecord(text: string): any;
+  static mimeMediaRecord(mimeType: string, payload: string): any;
+  static androidApplicationRecord(packageName: string): any;
 }
diff --git a/src/plugins/pay-pal.ts b/src/plugins/pay-pal.ts
index 4f58613d6..810ea39d6 100644
--- a/src/plugins/pay-pal.ts
+++ b/src/plugins/pay-pal.ts
@@ -84,7 +84,9 @@ export interface PayPalEnvironment {
   PayPalEnvironmentProduction: string;
   PayPalEnvironmentSandbox: string;
 }
-
+/**
+ * @private
+ */
 export declare class PayPalPayment {
   /**
    * Convenience constructor.
@@ -154,7 +156,9 @@ export interface PayPalConfigurationOptions {
   sandboxUserPAssword?: string;
   sandboxUserPin?: string;
 }
-
+/**
+ * @private
+ */
 export declare class PayPalConfiguration {
   /**
    * You use a PayPalConfiguration object to configure many aspects of how the SDK behaves.
@@ -162,7 +166,9 @@ export declare class PayPalConfiguration {
    */
   new(options: PayPalConfigurationOptions);
 }
-
+/**
+ * @private
+ */
 export declare class PayPalShippingAddress {
   /**
    * See the documentation of the individual properties for more detail.