diff --git a/src/compiler/diagnosticInformationMap.generated.ts b/src/compiler/diagnosticInformationMap.generated.ts
index 611aa38c1f3..a04407454fb 100644
--- a/src/compiler/diagnosticInformationMap.generated.ts
+++ b/src/compiler/diagnosticInformationMap.generated.ts
@@ -120,6 +120,7 @@ module ts {
         const_declarations_must_be_initialized: { code: 1155, category: DiagnosticCategory.Error, key: "'const' declarations must be initialized" },
         const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: DiagnosticCategory.Error, key: "'const' declarations can only be declared inside a block." },
         let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: DiagnosticCategory.Error, key: "'let' declarations can only be declared inside a block." },
+        Aliased_type_cannot_be_an_object_type_literal_Use_an_interface_declaration_instead: { code: 1158, category: DiagnosticCategory.Error, key: "Aliased type cannot be an object type literal. Use an interface declaration instead." },
         Duplicate_identifier_0: { code: 2300, category: DiagnosticCategory.Error, key: "Duplicate identifier '{0}'." },
         Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: DiagnosticCategory.Error, key: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
         Static_members_cannot_reference_class_type_parameters: { code: 2302, category: DiagnosticCategory.Error, key: "Static members cannot reference class type parameters." },
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index d11ec004cb7..c2086f6eaa9 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -471,6 +471,10 @@
         "category": "Error",
         "code": 1157
     },
+    "Aliased type cannot be an object type literal. Use an interface declaration instead.": {
+        "category": "Error",
+        "code": 1158
+    },
 
     "Duplicate identifier '{0}'.": {
         "category": "Error",
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index db7aeeead75..1ffdab29752 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -3761,6 +3761,13 @@ module ts {
             parseExpected(SyntaxKind.EqualsToken);
             node.type = parseType();
             parseSemicolon();
+            var n = node.type;
+            while (n.kind === SyntaxKind.ParenType) {
+                n = (<ParenTypeNode>n).type;
+            }
+            if (n.kind === SyntaxKind.TypeLiteral && (n.pos !== (<TypeLiteralNode>n).members.pos || n.end !== (<TypeLiteralNode>n).members.end)) {
+                grammarErrorOnNode(node.type, Diagnostics.Aliased_type_cannot_be_an_object_type_literal_Use_an_interface_declaration_instead);
+            }
             return finishNode(node);
         }