diff --git a/src/mono/wasm/runtime/loader/blazor/BootConfig.ts b/src/mono/wasm/runtime/loader/blazor/BootConfig.ts
index 2dd751cbf748e4..05defc18901352 100644
--- a/src/mono/wasm/runtime/loader/blazor/BootConfig.ts
+++ b/src/mono/wasm/runtime/loader/blazor/BootConfig.ts
@@ -11,7 +11,7 @@ export class BootConfigResult {
     private constructor(public bootConfig: BootJsonData, public applicationEnvironment: string) {
     }
 
-    static fromFetchResponse(bootConfigResponse: Response, bootConfig: BootJsonData, environment?: string): BootConfigResult {
+    static fromFetchResponse(bootConfigResponse: Response, bootConfig: BootJsonData, environment: string | undefined): BootConfigResult {
         const applicationEnvironment = environment || (loaderHelpers.getApplicationEnvironment && loaderHelpers.getApplicationEnvironment(bootConfigResponse)) || "Production";
         bootConfig.modifiableAssemblies = bootConfigResponse.headers.get("DOTNET-MODIFIABLE-ASSEMBLIES");
         bootConfig.aspnetCoreBrowserTools = bootConfigResponse.headers.get("ASPNETCORE-BROWSER-TOOLS");
diff --git a/src/mono/wasm/runtime/loader/blazor/_Integration.ts b/src/mono/wasm/runtime/loader/blazor/_Integration.ts
index 22c0d65057836f..47d9af0763be79 100644
--- a/src/mono/wasm/runtime/loader/blazor/_Integration.ts
+++ b/src/mono/wasm/runtime/loader/blazor/_Integration.ts
@@ -14,11 +14,9 @@ import { ICUDataMode } from "../../types/blazor";
 let resourceLoader: WebAssemblyResourceLoader;
 
 export async function loadBootConfig(config: MonoConfigInternal, module: DotnetModuleInternal) {
-    const candidateOptions = config.startupOptions ?? {};
-    const environment = candidateOptions.environment;
-    const bootConfigPromise = BootConfigResult.initAsync(candidateOptions.loadBootResource, environment);
+    const bootConfigPromise = BootConfigResult.initAsync(config.startupOptions?.loadBootResource, config.applicationEnvironment);
     const bootConfigResult: BootConfigResult = await bootConfigPromise;
-    await initializeBootConfig(bootConfigResult, module, candidateOptions);
+    await initializeBootConfig(bootConfigResult, module, config.startupOptions);
 }
 
 export async function initializeBootConfig(bootConfigResult: BootConfigResult, module: DotnetModuleInternal, startupOptions?: Partial<WebAssemblyStartOptions>) {
diff --git a/src/mono/wasm/runtime/loader/config.ts b/src/mono/wasm/runtime/loader/config.ts
index 7e6b21ef4f6c31..1d09292a0c9f15 100644
--- a/src/mono/wasm/runtime/loader/config.ts
+++ b/src/mono/wasm/runtime/loader/config.ts
@@ -81,6 +81,8 @@ export async function mono_wasm_load_config(module: DotnetModuleInternal): Promi
     }
     if (loaderHelpers.diagnosticTracing) console.debug("MONO_WASM: mono_wasm_load_config");
     try {
+        loaderHelpers.config.applicationEnvironment = loaderHelpers.config.applicationEnvironment ?? loaderHelpers.config.startupOptions?.environment ?? "Production";
+
         if (loaderHelpers.config.startupOptions && loaderHelpers.config.startupOptions.loadBootResource) {
             // If we have custom loadBootResource
             await loadBootConfig(loaderHelpers.config, module);
@@ -91,7 +93,7 @@ export async function mono_wasm_load_config(module: DotnetModuleInternal): Promi
             const loadedAnyConfig: any = (await configResponse.json()) || {};
             if (loadedAnyConfig.resources) {
                 // If we found boot config schema
-                await initializeBootConfig(BootConfigResult.fromFetchResponse(configResponse, loadedAnyConfig as BootJsonData), module);
+                await initializeBootConfig(BootConfigResult.fromFetchResponse(configResponse, loadedAnyConfig as BootJsonData, loaderHelpers.config.applicationEnvironment), module, loaderHelpers.config.startupOptions);
             } else {
                 // Otherwise we found mono config schema
                 const loadedConfig = loadedAnyConfig as MonoConfigInternal;