diff --git a/lib/extensions.js b/lib/extensions.js
index 5c793e34..033d305c 100644
--- a/lib/extensions.js
+++ b/lib/extensions.js
@@ -167,6 +167,68 @@ module.exports = function(realmConstructor) {
             Complete: 1,    // The subscription has been processed by the sync server and data is being synced to the device.
             Invalidated: 3, // The subscription has been removed.
         };
+
+        // Define the permission schemas as constructors so that they can be
+        // passed into directly to functions which want object type names
+        const permissionsSchema = Object.freeze({
+            Class: function() {},
+            Permission: function() {},
+            Realm: function() {},
+            Role: function() {},
+            User: function() {},
+        });
+        permissionsSchema.Permission.schema = Object.freeze({
+            name: '__Permission',
+            properties: {
+                role: '__Role',
+                canRead: {type: 'bool', default: false},
+                canUpdate: {type: 'bool', default: false},
+                canDelete: {type: 'bool', default: false},
+                canSetPermissions: {type: 'bool', default: false},
+                canQuery: {type: 'bool', default: false},
+                canCreate: {type: 'bool', default: false},
+                canModifySchema: {type: 'bool', default: false},
+            }
+        });
+
+        permissionsSchema.User.schema = Object.freeze({
+            name: '__User',
+            primaryKey: 'id',
+            properties: {
+                id: 'string'
+            }
+        });
+
+        permissionsSchema.Role.schema = Object.freeze({
+            name: '__Role',
+            primaryKey: 'name',
+            properties: {
+                name: 'string',
+                members: '__User[]'
+            }
+        });
+
+        permissionsSchema.Class.schema = Object.freeze({
+            name: '__Class',
+            primaryKey: 'class_name',
+            properties: {
+                class_name: 'string',
+                permissions: '__Permission[]'
+            }
+        });
+
+        permissionsSchema.Realm.schema = Object.freeze({
+            name: '__Realm',
+            primaryKey: 'id',
+            properties: {
+                id: 'int',
+                permissions: '__Permission[]'
+            }
+        });
+        Object.defineProperty(realmConstructor, 'Permissions', {
+            value: permissionsSchema,
+            configurable: false
+        });
     }
 
     // TODO: Remove this now useless object.
diff --git a/lib/index.d.ts b/lib/index.d.ts
index 76cd5432..490b43fa 100644
--- a/lib/index.d.ts
+++ b/lib/index.d.ts
@@ -622,6 +622,33 @@ declare class Realm {
     compact(): boolean;
 }
 
+declare namespace Realm.Permissions {
+    interface Permission {
+        identity: string;
+        canRead: boolean;
+        canUpdate: boolean;
+        canDelete: boolean;
+        canSetPermissions: boolean;
+        canQuery: boolean;
+        canCreate: boolean;
+        canModifySchema: boolean;
+    }
+    interface User {
+        identity: string;
+    }
+    interface Role {
+        name: string;
+        members: User[];
+    }
+    interface Class {
+        class_name: string;
+        permissions: Permission[];
+    }
+    interface Realm {
+        permissions: Permission[];
+    }
+}
+
 declare module 'realm' {
     export = Realm
 }
diff --git a/src/object-store b/src/object-store
index bb559df9..39c133a9 160000
--- a/src/object-store
+++ b/src/object-store
@@ -1 +1 @@
-Subproject commit bb559df9237ece49f9c889993f7c1aff619b48f9
+Subproject commit 39c133a9aff6feaa76e9631696bdf67bc57ed5d5