diff --git a/src/legacy/server/kbn_server.d.ts b/src/legacy/server/kbn_server.d.ts
index ad4d3b92c5c66..3bb885dbee756 100644
--- a/src/legacy/server/kbn_server.d.ts
+++ b/src/legacy/server/kbn_server.d.ts
@@ -62,7 +62,7 @@ type KbnMixinFunc = (kbnServer: KbnServer, server: Server, config: any) => Promi
 type Unpromise<T> = T extends Promise<infer U> ? U : T;
 export default class KbnServer {
   public readonly newPlatform: {
-    start: {
+    setup: {
       core: {
         elasticsearch: ElasticsearchServiceSetup;
       };
diff --git a/src/legacy/ui/public/new_platform/new_platform.ts b/src/legacy/ui/public/new_platform/new_platform.ts
index 7c6e5380cea1a..d6ea22e4e703f 100644
--- a/src/legacy/ui/public/new_platform/new_platform.ts
+++ b/src/legacy/ui/public/new_platform/new_platform.ts
@@ -38,18 +38,18 @@ interface CoreSetup {
 }
 
 const runtimeContext = {
-  start: {
+  setup: {
     core: null as CoreSetup | null,
     plugins: {},
   },
 };
 
 export function __newPlatformInit__(core: CoreSetup) {
-  if (runtimeContext.start.core) {
+  if (runtimeContext.setup.core) {
     throw new Error('New platform core api was already initialized');
   }
 
-  runtimeContext.start.core = core;
+  runtimeContext.setup.core = core;
 }
 
 export function getNewPlatform() {