diff --git a/lib/crypto.js b/lib/crypto.js
index f6c5b7313b69af..cce9bfea86f61a 100644
--- a/lib/crypto.js
+++ b/lib/crypto.js
@@ -247,12 +247,16 @@ Object.defineProperties(exports, {
   // The ecosystem needs those to exist for backwards compatibility.
   prng: {
     enumerable: false,
+    configurable: true,
+    writable: true,
     value: pendingDeprecation ?
       deprecate(randomBytes, 'crypto.prng is deprecated.', 'DEP0115') :
       randomBytes
   },
   pseudoRandomBytes: {
     enumerable: false,
+    configurable: true,
+    writable: true,
     value: pendingDeprecation ?
       deprecate(randomBytes,
                 'crypto.pseudoRandomBytes is deprecated.', 'DEP0115') :
@@ -260,6 +264,8 @@ Object.defineProperties(exports, {
   },
   rng: {
     enumerable: false,
+    configurable: true,
+    writable: true,
     value: pendingDeprecation ?
       deprecate(randomBytes, 'crypto.rng is deprecated.', 'DEP0115') :
       randomBytes
diff --git a/test/parallel/test-crypto-random.js b/test/parallel/test-crypto-random.js
index df06134e4326f9..4c85545b4e40b1 100644
--- a/test/parallel/test-crypto-random.js
+++ b/test/parallel/test-crypto-random.js
@@ -306,3 +306,12 @@ assert.throws(
     }
   );
 });
+
+
+['pseudoRandomBytes', 'prng', 'rng'].forEach((f) => {
+  const desc = Object.getOwnPropertyDescriptor(crypto, f);
+  assert.ok(desc);
+  assert.strictEqual(desc.configurable, true);
+  assert.strictEqual(desc.writable, true);
+  assert.strictEqual(desc.enumerable, false);
+});