diff --git a/packages/nextjs/src/index.types.ts b/packages/nextjs/src/index.types.ts
index 7c92fecd7834..842e92fe8eaf 100644
--- a/packages/nextjs/src/index.types.ts
+++ b/packages/nextjs/src/index.types.ts
@@ -151,3 +151,5 @@ export declare const openFeatureIntegration: typeof clientSdk.openFeatureIntegra
 export declare const OpenFeatureIntegrationHook: typeof clientSdk.OpenFeatureIntegrationHook;
 export declare const statsigIntegration: typeof clientSdk.statsigIntegration;
 export declare const unleashIntegration: typeof clientSdk.unleashIntegration;
+
+export declare const captureRouterTransitionStart: typeof clientSdk.captureRouterTransitionStart;
diff --git a/packages/nextjs/src/server/index.ts b/packages/nextjs/src/server/index.ts
index 0483ab6448ff..df6c1e7398c9 100644
--- a/packages/nextjs/src/server/index.ts
+++ b/packages/nextjs/src/server/index.ts
@@ -93,6 +93,13 @@ export function showReportDialog(): void {
   return;
 }
 
+/**
+ * Noop on the server - this is a client-only API to capture Next.js router transitions.
+ */
+export function captureRouterTransitionStart(_href: string, _navigationType: string): void {
+  return;
+}
+
 /**
  * Returns the runtime configuration for the SDK based on the environment.
  * When running on OpenNext/Cloudflare, returns cloudflare runtime config.