diff --git a/lib/amd-helpers.js b/lib/amd-helpers.js
index 2ba796a9..9b8483e4 100644
--- a/lib/amd-helpers.js
+++ b/lib/amd-helpers.js
@@ -193,9 +193,11 @@ hookConstructor(function(constructor) {
         if (!entry.name) {
           if (!curMeta)
             throw new TypeError('Unexpected anonymous AMD define.');
+
+          if (curMeta.entry && !curMeta.entry.name)
+            throw new Error('Multiple anonymous defines in module ' + load.name);
           
-          if (!curMeta.entry || curMeta.entry.name)
-            curMeta.entry = entry;
+          curMeta.entry = entry;
         }
         // named define
         else {
diff --git a/test/test.js b/test/test.js
index 462080c8..370fd3fd 100644
--- a/test/test.js
+++ b/test/test.js
@@ -301,6 +301,16 @@ asyncTest('Loading an AMD bundle with an anonymous define', function() {
   }, err);
 });
 
+asyncTest('Loading an AMD bundle with multiple anonymous defines', function() {
+  System['import']('tests/multiple-anonymous.js').then(function(m) {
+    ok(false);
+    start();
+  }, function(e) {
+    ok(e.toString().indexOf('Multiple anonymous') != -1)
+    start();
+  });
+})
+
 asyncTest('Loading AMD CommonJS form', function() {
   System['import']('tests/amd-cjs-module.js').then(function(m) {
     ok(m.test == 'hi', 'Not defined');
diff --git a/test/tests/multiple-anonymous.js b/test/tests/multiple-anonymous.js
new file mode 100644
index 00000000..5e4b93f9
--- /dev/null
+++ b/test/tests/multiple-anonymous.js
@@ -0,0 +1,14 @@
+define('named-in-anon', function() {
+  return 'named';
+});
+
+define(['named-in-anon'], function(named) {
+  return {
+    anon: true,
+    named: named
+  };
+});
+
+define([], function() {
+
+});
\ No newline at end of file