diff --git a/spec/core/PrettyPrintSpec.js b/spec/core/PrettyPrintSpec.js
index becf8a61..6d1cfc08 100644
--- a/spec/core/PrettyPrintSpec.js
+++ b/spec/core/PrettyPrintSpec.js
@@ -32,6 +32,14 @@ describe("jasmine.pp", function () {
     }, bar: [1, 2, 3]})).toEqual("{ foo : Function, bar : [ 1, 2, 3 ] }");
   });
 
+  it("should not include inherited properties when stringifying an object", function() {
+    var SomeClass = function() {};
+    SomeClass.prototype.foo = "inherited foo";
+    var instance = new SomeClass();
+    instance.bar = "my own bar";
+    expect(jasmine.pp(instance)).toEqual("{ bar : 'my own bar' }");
+  });
+
   it("should stringify RegExp objects properly", function() {
     expect(jasmine.pp(/x|y|z/)).toEqual("/x|y|z/");
   });
diff --git a/src/core/PrettyPrinter.js b/src/core/PrettyPrinter.js
index a7d283b6..74fa4e7a 100644
--- a/src/core/PrettyPrinter.js
+++ b/src/core/PrettyPrinter.js
@@ -57,6 +57,7 @@ jasmine.PrettyPrinter.prototype.format = function(value) {
 
 jasmine.PrettyPrinter.prototype.iterateObject = function(obj, fn) {
   for (var property in obj) {
+    if (!obj.hasOwnProperty(property)) continue;
     if (property == '__Jasmine_been_here_before__') continue;
     fn(property, obj.__lookupGetter__ ? (obj.__lookupGetter__(property) !== jasmine.undefined && 
                                          obj.__lookupGetter__(property) !== null) : false);