diff --git a/core/random.js b/core/random.js
index 2a6f135..6ae049f 100644
--- a/core/random.js
+++ b/core/random.js
@@ -366,3 +366,13 @@ sjcl.random = {
   }
 };
 
+(function(){
+  try {
+    // get cryptographically strong entropy in Webkit
+    var ab = new Uint32Array(32), i;
+    crypto.getRandomValues(ab);
+    sjcl.random.addEntropy(ab, 1024, "crypto.getRandomValues");
+  } catch (e) {
+    // no getRandomValues :-(
+  }
+})();