diff --git a/api/@internal/component/ets/nav_destination.d.ts b/api/@internal/component/ets/nav_destination.d.ts
index 3868d8de29e0bfedde5d06214ce59e6e25b5ccb0..ff5b52d3a3372aaec961772ab1b32c0040600b05 100644
--- a/api/@internal/component/ets/nav_destination.d.ts
+++ b/api/@internal/component/ets/nav_destination.d.ts
@@ -40,7 +40,7 @@ declare interface NavDestinationCustomTitle {
    * Sets the custom title builder.
    * @since 9
    */
-  builder: string;
+  builder: CustomBuilder;
 
   /**
    * Sets the custom title height.
@@ -55,7 +55,7 @@ declare interface NavDestinationCustomTitle {
  */
 declare interface NavDestinationInterface {
   /**
-   * constructor.
+   * Constructor.
    * @since 9
    */
   (): NavDestinationAttribute;
diff --git a/api/@internal/component/ets/nav_router.d.ts b/api/@internal/component/ets/nav_router.d.ts
index f6d6718aa13c1b892519e5219a5c2990a2728f8e..44ea2af9b8d3ef9ca14607b1d02c884f6bc6b72b 100644
--- a/api/@internal/component/ets/nav_router.d.ts
+++ b/api/@internal/component/ets/nav_router.d.ts
@@ -19,7 +19,7 @@
  */
 declare interface NavRouterInterface {
   /**
-   * constructor.
+   * Constructor.
    * @since 9
    */
   (): NavRouterAttribute;
diff --git a/api/@internal/component/ets/navigation.d.ts b/api/@internal/component/ets/navigation.d.ts
index 74d0480687986f96314cd1efe105e1a108112c4c..3cec4a169d5aed8a02e80e1fb0e000873c44dd27 100644
--- a/api/@internal/component/ets/navigation.d.ts
+++ b/api/@internal/component/ets/navigation.d.ts
@@ -40,7 +40,7 @@ declare interface NavigationCustomTitle {
    * Sets the custom title builder.
    * @since 9
    */
-  builder: string;
+  builder: CustomBuilder;
 
   /**
    * Sets the custom title height.