diff --git a/mustache.js b/mustache.js
index 55b36c1..cbe7e89 100644
--- a/mustache.js
+++ b/mustache.js
@@ -30,10 +30,10 @@ var Mustache = function() {
     */
     render_partial: function(name, context, partials) {
 			if(typeof(context[name]) != "object") {
-				throw({message: "Context for '" + name + "' is not an object."});
+				throw("Context for '" + name + "' is not an object.");
 			}
 	    if(!partials || !partials[name]) {
-        throw({message: "No template for partial '" + name + "'."});
+        throw("No template for partial '" + name + "'.");
       }
       return this.render(partials[name], context[name], partials);
     },
@@ -169,7 +169,7 @@ var Mustache = function() {
           } else {
             src = context.toString();
           }
-          throw({message: "'" + name + "' not found in context: " + src});
+          throw("'" + name + "' not found in context: " + src);
         }
         ctx = ctx[p];
       }
diff --git a/test/mustache_spec.rb b/test/mustache_spec.rb
index 4bd3ec6..911e1b6 100644
--- a/test/mustache_spec.rb
+++ b/test/mustache_spec.rb
@@ -34,7 +34,7 @@ describe "mustache" do
       try {
         print(Mustache.to_html("{{#list}}{{x}}{{/list}}", {list: [{}]}));
       } catch(e) {
-        print('ERROR: ' + e.message);
+        print('ERROR: ' + e);
       }
     JS
     run_js(js).should == "ERROR: 'x' not found in context: {list:[{}]}\n"
@@ -54,7 +54,7 @@ describe "mustache" do
             var result = Mustache.to_html(template, #{testname});
             print(result);
           } catch(e) {
-            print('ERROR: ' + e.message);
+            print('ERROR: ' + e);
           }
         JS
 
@@ -79,7 +79,7 @@ describe "mustache" do
             var result = Mustache.to_html(template, partial_context, partials);
             print(result);
           } catch(e) {
-            print('ERROR: ' + e.message);
+            print('ERROR: ' + e);
           }
         JS