diff --git a/packages/runtime-core/src/components/Suspense.ts b/packages/runtime-core/src/components/Suspense.ts
index 85001f500cf..3a304bdb06e 100644
--- a/packages/runtime-core/src/components/Suspense.ts
+++ b/packages/runtime-core/src/components/Suspense.ts
@@ -36,6 +36,10 @@ export interface SuspenseProps {
   onResolve?: () => void
   onPending?: () => void
   onFallback?: () => void
+  /**
+   * Switch to fallback content if it takes longer than `timeout` milliseconds to render the new default content.
+   * A `timeout` value of `0` will cause the fallback content to be displayed immediately when default content is replaced.
+   */
   timeout?: string | number
   /**
    * Allow suspense to be captured by parent suspense