diff --git a/lib/jasmine.js b/lib/jasmine.js
index 60bdf1d..faa943f 100644
--- a/lib/jasmine.js
+++ b/lib/jasmine.js
@@ -1386,9 +1386,11 @@ jasmine.Matchers.prototype.toThrow = function(expected) {
     result = (expected === jasmine.undefined || this.env.equals_(exception.message || exception, expected.message || expected));
   }
 
+  var not = this.isNot ? "not " : "";
+
   this.message = function() {
     if (exception && (expected === jasmine.undefined || !this.env.equals_(exception.message || exception, expected.message || expected))) {
-      return ["Expected function to throw", expected ? expected.message || expected : " an exception", ", but it threw", exception.message || exception].join(' ');
+      return ["Expected function " + not + "to throw", expected ? expected.message || expected : " an exception", ", but it threw", exception.message || exception].join(' ');
     } else {
       return "Expected function to throw an exception.";
     }
@@ -2415,5 +2417,5 @@ jasmine.version_= {
   "major": 0,
   "minor": 11,
   "build": 1,
-  "revision": 1282784791
+  "revision": 1282785506
 };