diff --git a/docs/solid-typeindex-support.typeindexhelper.getfromtypeindex.md b/docs/solid-typeindex-support.typeindexhelper.getfromtypeindex.md
index 49bf98b..d1febdc 100644
--- a/docs/solid-typeindex-support.typeindexhelper.getfromtypeindex.md
+++ b/docs/solid-typeindex-support.typeindexhelper.getfromtypeindex.md
@@ -9,7 +9,7 @@ Retrieves all instances of the given RDF class from the user's typeIndexe.
 **Signature:**
 
 ```typescript
-static getFromTypeIndex(webId: string, rdfClass: string, fetch: any, isPrivate: true): Promise<string[]>;
+static getFromTypeIndex(webId: string, rdfClass: string, fetch: any, isPrivate: boolean): Promise<string[]>;
 ```
 
 ## Parameters
@@ -19,7 +19,7 @@ static getFromTypeIndex(webId: string, rdfClass: string, fetch: any, isPrivate:
 |  webId | string | The user's WebID |
 |  rdfClass | string | The RDF class to retrieve instances for |
 |  fetch | any | Authenticated fetch function |
-|  isPrivate | true | Whether the typeIndexe is private or public |
+|  isPrivate | boolean | Whether the typeIndexe is private or public |
 
 **Returns:**
 
diff --git a/etc/solid-typeindex-support.api.md b/etc/solid-typeindex-support.api.md
index dbe740d..7b171f5 100644
--- a/etc/solid-typeindex-support.api.md
+++ b/etc/solid-typeindex-support.api.md
@@ -8,7 +8,7 @@ import { SolidDataset } from '@inrupt/solid-client';
 
 // @public
 export class TypeIndexHelper {
-    static getFromTypeIndex(webId: string, rdfClass: string, fetch: any, isPrivate: true): Promise<string[]>;
+    static getFromTypeIndex(webId: string, rdfClass: string, fetch: any, isPrivate: boolean): Promise<string[]>;
     static registerInTypeIndex(webId: string, typeRegistrationTitle: string, rdfClass: string, fetch: any, indexUrl: string, isPrivate: boolean): Promise<SolidDataset>;
 }
 
diff --git a/src/TypeIndexHelper.ts b/src/TypeIndexHelper.ts
index dbea458..995c225 100644
--- a/src/TypeIndexHelper.ts
+++ b/src/TypeIndexHelper.ts
@@ -133,7 +133,7 @@ export class TypeIndexHelper {
      * @param isPrivate - Whether the typeIndexe is private or public
      * @returns Promise resolving to an array of instance URLs
      */
-    public static async getFromTypeIndex(webId: string, rdfClass: string, fetch: any, isPrivate: true): Promise<string[]> {
+    public static async getFromTypeIndex(webId: string, rdfClass: string, fetch: any, isPrivate: boolean): Promise<string[]> {
         const typeIndex = await this.getTypeIndex(webId, fetch, isPrivate);
 
         const typeIndexDS = await getSolidDataset(typeIndex?.value, { fetch: fetch });