diff --git a/modules/angular2/src/core/annotations/decorators.ts b/modules/angular2/src/core/annotations/decorators.ts
index 3928b784e0..4dc0cec846 100644
--- a/modules/angular2/src/core/annotations/decorators.ts
+++ b/modules/angular2/src/core/annotations/decorators.ts
@@ -24,12 +24,12 @@ export interface ComponentTypeDecorator extends TypeDecorator {
 export interface ViewTypeDecorator extends TypeDecorator { View(obj: ViewArgs): ViewTypeDecorator }
 
 export interface Directive {
-  (obj: any): DirectiveTypeDecorator;
+  (obj: DirectiveArgs): DirectiveTypeDecorator;
   new (obj: DirectiveAnnotation): DirectiveAnnotation;
 }
 
 export interface Component {
-  (obj: any): ComponentTypeDecorator;
+  (obj: ComponentArgs): ComponentTypeDecorator;
   new (obj: ComponentAnnotation): ComponentAnnotation;
 }
 
diff --git a/modules/angular2/src/core/annotations_impl/annotations.ts b/modules/angular2/src/core/annotations_impl/annotations.ts
index 488db050e5..952b4b7e52 100644
--- a/modules/angular2/src/core/annotations_impl/annotations.ts
+++ b/modules/angular2/src/core/annotations_impl/annotations.ts
@@ -787,7 +787,7 @@ export class Directive extends Injectable {
   constructor({
                   selector, properties, events, host, lifecycle, hostInjector, exportAs,
                   compileChildren = true,
-              }: ComponentArgs = {}) {
+              }: DirectiveArgs = {}) {
     super();
     this.selector = selector;
     this.properties = properties;
@@ -800,7 +800,7 @@ export class Directive extends Injectable {
   }
 }
 
-export interface ComponentArgs {
+export interface DirectiveArgs {
   selector?: string;
   properties?: List<string>;
   events?: List<string>;
@@ -962,7 +962,7 @@ export class Component extends Directive {
 
   constructor({selector, properties, events, host, exportAs, appInjector, lifecycle, hostInjector,
                viewInjector, changeDetection = DEFAULT,
-               compileChildren = true}: DirectiveArgs = {}) {
+               compileChildren = true}: ComponentArgs = {}) {
     super({
       selector: selector,
       properties: properties,
@@ -979,21 +979,13 @@ export class Component extends Directive {
     this.viewInjector = viewInjector;
   }
 }
-export interface DirectiveArgs {
-  selector?: string;
-  properties?: List<string>;
-  events?: List<string>;
-  host?: StringMap<string, string>;
-  exportAs?: string;
+
+export interface ComponentArgs extends DirectiveArgs {
   appInjector?: List<any>;
-  lifecycle?: List<LifecycleEvent>;
-  hostInjector?: List<any>;
   viewInjector?: List<any>;
   changeDetection?: string;
-  compileChildren?: boolean;
 }
 
-
 /**
  * Lifecycle events are guaranteed to be called in the following order:
  * - `onChange` (optional if any bindings have changed),