diff --git a/packages/jsonld-dataset-proxy/src/setProxy/ldSet/BasicLdSet.ts b/packages/jsonld-dataset-proxy/src/setProxy/ldSet/BasicLdSet.ts
index d9cd776..5c11633 100644
--- a/packages/jsonld-dataset-proxy/src/setProxy/ldSet/BasicLdSet.ts
+++ b/packages/jsonld-dataset-proxy/src/setProxy/ldSet/BasicLdSet.ts
@@ -34,12 +34,12 @@ export class BasicLdSet<T> extends Set<T> implements LdSet<T> {
     }
   }
 
-  map<U>(callbackfn: (value: T, set: LdSet<T>) => U, thisArg?: any): LdSet<U> {
-    const newSet = new BasicLdSet<U>();
+  map<U>(callbackfn: (value: T, set: LdSet<T>) => U, thisArg?: any): U[] {
+    const returnValues: U[] = [];
     for (const value of this) {
-      newSet.add(callbackfn.call(thisArg, value, this));
+      returnValues.push(callbackfn.call(thisArg, value, this));
     }
-    return newSet;
+    return returnValues;
   }
 
   filter<S extends T>(
diff --git a/packages/jsonld-dataset-proxy/src/setProxy/ldSet/LdSet.ts b/packages/jsonld-dataset-proxy/src/setProxy/ldSet/LdSet.ts
index 9938639..1c76708 100644
--- a/packages/jsonld-dataset-proxy/src/setProxy/ldSet/LdSet.ts
+++ b/packages/jsonld-dataset-proxy/src/setProxy/ldSet/LdSet.ts
@@ -96,7 +96,7 @@ interface LdSet<T> extends Set<T> {
    * @param callbackfn A function that accepts up to two arguments. The map method calls the callbackfn function one time for each element in the set.
    * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
    */
-  map<U>(callbackfn: (value: T, set: LdSet<T>) => U, thisArg?: any): LdSet<U>;
+  map<U>(callbackfn: (value: T, set: LdSet<T>) => U, thisArg?: any): U[];
   /**
    * Returns the elements of a set that meet the condition specified in a callback function.
    * @param predicate A function that accepts up to two arguments. The filter method calls the predicate function one time for each element in the set.