diff --git a/packages/runtime-dom/__tests__/nodeOps.spec.ts b/packages/runtime-dom/__tests__/nodeOps.spec.ts
index ed30e42adee..db56ff25df5 100644
--- a/packages/runtime-dom/__tests__/nodeOps.spec.ts
+++ b/packages/runtime-dom/__tests__/nodeOps.spec.ts
@@ -18,6 +18,20 @@ describe('runtime-dom: node-ops', () => {
     expect(option2.selected).toBe(true)
   })
 
+  test('create custom elements', () => {
+    const spyCreateElement = vi.spyOn(document, 'createElement')
+
+    nodeOps.createElement('custom-element')
+    expect(spyCreateElement).toHaveBeenLastCalledWith('custom-element')
+
+    nodeOps.createElement('custom-element', undefined, 'li')
+    expect(spyCreateElement).toHaveBeenLastCalledWith('custom-element', {
+      is: 'li',
+    })
+
+    spyCreateElement.mockClear()
+  })
+
   describe('insertStaticContent', () => {
     test('fresh insertion', () => {
       const content = `<div>one</div><div>two</div>three`
diff --git a/packages/runtime-dom/src/nodeOps.ts b/packages/runtime-dom/src/nodeOps.ts
index a318000aa91..ef3ef0748c1 100644
--- a/packages/runtime-dom/src/nodeOps.ts
+++ b/packages/runtime-dom/src/nodeOps.ts
@@ -25,7 +25,9 @@ export const nodeOps: Omit<RendererOptions<Node, Element>, 'patchProp'> = {
         ? doc.createElementNS(svgNS, tag)
         : namespace === 'mathml'
           ? doc.createElementNS(mathmlNS, tag)
-          : doc.createElement(tag, is ? { is } : undefined)
+          : is
+            ? doc.createElement(tag, { is })
+            : doc.createElement(tag)
 
     if (tag === 'select' && props && props.multiple != null) {
       ;(el as HTMLSelectElement).setAttribute('multiple', props.multiple)