diff --git a/packages/angular/mf/mf.ts b/packages/angular/mf/mf.ts
index 7c3a9e48b7305..a1d65b1926f48 100644
--- a/packages/angular/mf/mf.ts
+++ b/packages/angular/mf/mf.ts
@@ -12,11 +12,15 @@ export function setRemoteUrlResolver(
   resolveRemoteUrl = _resolveRemoteUrl;
 }
 
-let remoteUrlDefinitions: Record<string, string>;
+let remoteUrlDefinitions: Record<string, string> = {};
 export function setRemoteDefinitions(definitions: Record<string, string>) {
   remoteUrlDefinitions = definitions;
 }
 
+export function setRemoteDefinition(remoteName: string, remoteUrl: string) {
+  remoteUrlDefinitions[remoteName] = remoteUrl;
+}
+
 let remoteModuleMap = new Map<string, unknown>();
 let remoteContainerMap = new Map<string, unknown>();
 export async function loadRemoteModule(remoteName: string, moduleName: string) {
diff --git a/packages/react/mf/dynamic-federation.ts b/packages/react/mf/dynamic-federation.ts
index 4584452c2d171..5f5e60eeec7e2 100644
--- a/packages/react/mf/dynamic-federation.ts
+++ b/packages/react/mf/dynamic-federation.ts
@@ -15,7 +15,7 @@ declare const document: {
 
 declare const __webpack_init_sharing__: (scope: 'default') => Promise<void>;
 declare const __webpack_share_scopes__: { default: unknown };
-let remoteUrlDefinitions: Record<string, string>;
+let remoteUrlDefinitions: Record<string, string> = {};
 let resolveRemoteUrl: ResolveRemoteUrlFunction;
 const remoteModuleMap = new Map<string, unknown>();
 const remoteContainerMap = new Map<string, unknown>();
@@ -31,6 +31,10 @@ export function setRemoteDefinitions(definitions: Record<string, string>) {
   remoteUrlDefinitions = definitions;
 }
 
+export function setRemoteDefinition(remoteName: string, remoteUrl: string) {
+  remoteUrlDefinitions[remoteName] = remoteUrl;
+}
+
 export async function loadRemoteModule(remoteName: string, moduleName: string) {
   const remoteModuleKey = `${remoteName}:${moduleName}`;
   if (remoteModuleMap.has(remoteModuleKey)) {