2 files changed, 7 insertions, 4 deletions
diff --git a/runtime/js/06_util.js b/runtime/js/06_util.js
index 9df9ac88a..3809cc9d0 100644
--- a/runtime/js/06_util.js
+++ b/runtime/js/06_util.js
@@ -117,6 +117,7 @@
     return {
       value,
       writable: true,
+      enumerable: false,
       configurable: true,
     };
   }
@@ -125,6 +126,8 @@
     return {
       value,
       enumerable: true,
+      writable: false,
+      configurable: true,
     };
   }
 
@@ -132,6 +135,7 @@
     return {
       get: getter,
       enumerable: true,
+      configurable: true,
     };
   }
 
diff --git a/runtime/js/99_main.js b/runtime/js/99_main.js
index 09a2ebb55..91a4dcefd 100644
--- a/runtime/js/99_main.js
+++ b/runtime/js/99_main.js
@@ -492,10 +492,9 @@ delete Object.prototype.__proto__;
       Object.assign(finalDenoNs, denoNsUnstable);
     }
 
-    // Setup `Deno` global - we're actually overriding already
-    // existing global `Deno` with `Deno` namespace from "./deno.ts".
-    util.immutableDefine(globalThis, "Deno", finalDenoNs);
-    Object.freeze(globalThis.Deno);
+    // Setup `Deno` global - we're actually overriding already existing global
+    // `Deno` with `Deno` namespace from "./deno.ts".
+    Object.defineProperty(globalThis, "Deno", util.readOnly(finalDenoNs));
     Object.freeze(globalThis.Deno.core);
     Object.freeze(globalThis.Deno.core.sharedQueue);
     signals.setSignals();