diff --git a/src/mono/browser/runtime/loader/config.ts b/src/mono/browser/runtime/loader/config.ts
index 9de5c7bb26c2be..8f5cf705b1d8fa 100644
--- a/src/mono/browser/runtime/loader/config.ts
+++ b/src/mono/browser/runtime/loader/config.ts
@@ -56,12 +56,18 @@ function deep_merge_resources (target: Assets, source: Assets): Assets {
     if (target === source) return target;
 
     const providedResources: Assets = { ...source };
+    if (providedResources.coreAssembly !== undefined) {
+        providedResources.coreAssembly = [...(target.coreAssembly || []), ...(providedResources.coreAssembly || [])];
+    }
     if (providedResources.assembly !== undefined) {
         providedResources.assembly = [...(target.assembly || []), ...(providedResources.assembly || [])];
     }
     if (providedResources.lazyAssembly !== undefined) {
         providedResources.lazyAssembly = [...(target.lazyAssembly || []), ...(providedResources.lazyAssembly || [])];
     }
+    if (providedResources.corePdb !== undefined) {
+        providedResources.corePdb = [...(target.corePdb || []), ...(providedResources.corePdb || [])];
+    }
     if (providedResources.pdb !== undefined) {
         providedResources.pdb = [...(target.pdb || []), ...(providedResources.pdb || [])];
     }
diff --git a/src/mono/browser/runtime/startup.ts b/src/mono/browser/runtime/startup.ts
index 083071124f6d2c..0bfa9466553abc 100644
--- a/src/mono/browser/runtime/startup.ts
+++ b/src/mono/browser/runtime/startup.ts
@@ -611,7 +611,7 @@ export function mono_wasm_load_runtime (): void {
                 debugLevel = 0 + debugLevel;
             }
         }
-        if (!loaderHelpers.isDebuggingSupported() || !runtimeHelpers.config.resources!.pdb) {
+        if (!loaderHelpers.isDebuggingSupported() || !(runtimeHelpers.config.resources!.corePdb || runtimeHelpers.config.resources!.pdb)) {
             debugLevel = 0;
         }