diff --git a/src/runtime/utils.ts b/src/runtime/utils.ts
index 1e22e9b59..640c790bc 100644
--- a/src/runtime/utils.ts
+++ b/src/runtime/utils.ts
@@ -83,7 +83,7 @@ export function useRegistryScript<T extends Record<string | symbol, any>, O = Em
   }
 
   const scriptInput = defu(finalScriptInput, userOptions.scriptInput, { key: registryKey }) as any as UseScriptInput
-  const scriptOptions = Object.assign(userOptions?.scriptOptions || {}, options.scriptOptions || {})
+  const scriptOptions = { ...userOptions?.scriptOptions, ...options.scriptOptions }
   if (import.meta.dev) {
     // Capture where the component was loaded from
     const error = new Error('Stack trace for component location')
diff --git a/test/unit/utils.test.ts b/test/unit/utils.test.ts
index 4f7e07ab7..f21b61024 100644
--- a/test/unit/utils.test.ts
+++ b/test/unit/utils.test.ts
@@ -14,6 +14,21 @@ vi.mock('#nuxt-scripts-validator', () => ({
   parse: vi.fn(),
 }))
 
+describe('useRegistryScript scriptOptions', () => {
+  it('should not mutate user-provided scriptOptions', () => {
+    const mockOptionsFunction = vi.fn((_opts, _ctx) => ({
+      scriptInput: { src: 'https://example.com/script.js' },
+      scriptOptions: { use: () => ({ test: true }) },
+    }))
+
+    const userScriptOptions = { trigger: 'onNuxtReady' as const }
+    const userOptions = { scriptOptions: userScriptOptions }
+    useRegistryScript('test', mockOptionsFunction, userOptions)
+
+    expect(userScriptOptions).not.toHaveProperty('use')
+  })
+})
+
 describe('useRegistryScript query param merging', () => {
   it('should merge query params when user provides custom src', () => {
     const mockOptionsFunction = vi.fn((_opts, _ctx) => ({