diff --git a/packages/nuxt/src/core/utils/index.ts b/packages/nuxt/src/core/utils/index.ts
index 9ce54f0f06..8321e2fd01 100644
--- a/packages/nuxt/src/core/utils/index.ts
+++ b/packages/nuxt/src/core/utils/index.ts
@@ -2,6 +2,9 @@ export * from './names'
 export * from './plugins'
 
 export function uniqueBy<T, K extends keyof T> (arr: T[], key: K) {
+  if (arr.length < 2) {
+    return arr
+  }
   const res: T[] = []
   const seen = new Set<T[K]>()
   for (const item of arr) {