diff --git a/packages/sdk-rtl/src/delimArray.spec.ts b/packages/sdk-rtl/src/delimArray.spec.ts
index f2a03ed83..e87ea1fcf 100644
--- a/packages/sdk-rtl/src/delimArray.spec.ts
+++ b/packages/sdk-rtl/src/delimArray.spec.ts
@@ -47,6 +47,19 @@ describe('DelimArray', () => {
     expect(actual).toEqual('{1 2 3 4}')
   })
 
+  it('integer', () => {
+    const numbers = [2]
+    let values = new DelimArray<number>(numbers)
+    const expected = '2'
+    let actual = values.toString()
+    const normal = `${numbers}`
+    expect(normal).toEqual(expected)
+    expect(actual).toEqual(expected)
+    values = new DelimArray<number>(numbers, ' ', '{', '}')
+    actual = values.toString()
+    expect(actual).toEqual('{2}')
+  })
+
   it('strings', () => {
     const strings = ['a', 'b', 'c', 'd']
     let values = new DelimArray<string>(strings)
diff --git a/packages/sdk-rtl/src/delimArray.ts b/packages/sdk-rtl/src/delimArray.ts
index c5a76833a..8f0824276 100644
--- a/packages/sdk-rtl/src/delimArray.ts
+++ b/packages/sdk-rtl/src/delimArray.ts
@@ -31,7 +31,8 @@ export class DelimArray<T> extends Array<T> {
     public prefix: string = '',
     public suffix: string = ''
   ) {
-    super(...(items || []))
+    super()
+    this.push(...(items || []))
   }
 
   static create<T>(): DelimArray<T> {