diff --git a/packages/next/src/executors/server/server.impl.ts b/packages/next/src/executors/server/server.impl.ts
index 8e65b6a4956ce..78e06255ad43b 100644
--- a/packages/next/src/executors/server/server.impl.ts
+++ b/packages/next/src/executors/server/server.impl.ts
@@ -48,7 +48,7 @@ export default async function* serveExecutor(
   const args = createCliOptions({ port, hostname });
 
   if (keepAliveTimeout && !options.dev) {
-    args.push('--keepAliveTimeout', `${keepAliveTimeout}`);
+    args.push(`--keepAliveTimeout=${keepAliveTimeout}`);
   }
 
   const nextDir = resolve(context.root, buildOptions.outputPath);