diff --git a/modules/@angular/compiler/src/output/ts_emitter.ts b/modules/@angular/compiler/src/output/ts_emitter.ts
index 041d8d328a..3c1e6ea980 100644
--- a/modules/@angular/compiler/src/output/ts_emitter.ts
+++ b/modules/@angular/compiler/src/output/ts_emitter.ts
@@ -60,6 +60,13 @@ class _TsEmitterVisitor extends AbstractEmitterVisitor implements o.TypeVisitor
 
   importsWithPrefixes = new Map<string, string>();
 
+  visitType(t: o.Type, ctx: EmitterVisitorContext, defaultType: string = 'any') {
+    if (isPresent(t)) {
+      t.visitType(this, ctx);
+    } else {
+      ctx.print(defaultType);
+    }
+  }
   visitExternalExpr(ast: o.ExternalExpr, ctx: EmitterVisitorContext): any {
     this._visitIdentifier(ast.value, ast.typeParams, ctx);
     return null;
@@ -73,11 +80,8 @@ class _TsEmitterVisitor extends AbstractEmitterVisitor implements o.TypeVisitor
     } else {
       ctx.print(`var`);
     }
-    ctx.print(` ${stmt.name}`);
-    if (isPresent(stmt.type)) {
-      ctx.print(`:`);
-      stmt.type.visitType(this, ctx);
-    }
+    ctx.print(` ${stmt.name}:`);
+    this.visitType(stmt.type, ctx);
     ctx.print(` = `);
     stmt.value.visitExpression(this, ctx);
     ctx.println(`;`);
@@ -119,12 +123,8 @@ class _TsEmitterVisitor extends AbstractEmitterVisitor implements o.TypeVisitor
       ctx.print(`private `);
     }
     ctx.print(field.name);
-    if (isPresent(field.type)) {
-      ctx.print(`:`);
-      field.type.visitType(this, ctx);
-    } else {
-      ctx.print(`: any`);
-    }
+    ctx.print(':');
+    this.visitType(field.type, ctx);
     ctx.println(`;`);
   }
   private _visitClassGetter(getter: o.ClassGetter, ctx: EmitterVisitorContext) {
@@ -132,10 +132,8 @@ class _TsEmitterVisitor extends AbstractEmitterVisitor implements o.TypeVisitor
       ctx.print(`private `);
     }
     ctx.print(`get ${getter.name}()`);
-    if (isPresent(getter.type)) {
-      ctx.print(`:`);
-      getter.type.visitType(this, ctx);
-    }
+    ctx.print(':');
+    this.visitType(getter.type, ctx);
     ctx.println(` {`);
     ctx.incIndent();
     this.visitAllStatements(getter.body, ctx);
@@ -158,11 +156,7 @@ class _TsEmitterVisitor extends AbstractEmitterVisitor implements o.TypeVisitor
     ctx.print(`${method.name}(`);
     this._visitParams(method.params, ctx);
     ctx.print(`):`);
-    if (isPresent(method.type)) {
-      method.type.visitType(this, ctx);
-    } else {
-      ctx.print(`void`);
-    }
+    this.visitType(method.type, ctx, 'void');
     ctx.println(` {`);
     ctx.incIndent();
     this.visitAllStatements(method.body, ctx);
@@ -173,11 +167,7 @@ class _TsEmitterVisitor extends AbstractEmitterVisitor implements o.TypeVisitor
     ctx.print(`(`);
     this._visitParams(ast.params, ctx);
     ctx.print(`):`);
-    if (isPresent(ast.type)) {
-      ast.type.visitType(this, ctx);
-    } else {
-      ctx.print(`void`);
-    }
+    this.visitType(ast.type, ctx, 'void');
     ctx.println(` => {`);
     ctx.incIndent();
     this.visitAllStatements(ast.statements, ctx);
@@ -192,11 +182,7 @@ class _TsEmitterVisitor extends AbstractEmitterVisitor implements o.TypeVisitor
     ctx.print(`function ${stmt.name}(`);
     this._visitParams(stmt.params, ctx);
     ctx.print(`):`);
-    if (isPresent(stmt.type)) {
-      stmt.type.visitType(this, ctx);
-    } else {
-      ctx.print(`void`);
-    }
+    this.visitType(stmt.type, ctx, 'void');
     ctx.println(` {`);
     ctx.incIndent();
     this.visitAllStatements(stmt.statements, ctx);
@@ -253,21 +239,13 @@ class _TsEmitterVisitor extends AbstractEmitterVisitor implements o.TypeVisitor
     return null;
   }
   visitArrayType(type: o.ArrayType, ctx: EmitterVisitorContext): any {
-    if (isPresent(type.of)) {
-      type.of.visitType(this, ctx);
-    } else {
-      ctx.print(`any`);
-    }
+    this.visitType(type.of, ctx);
     ctx.print(`[]`);
     return null;
   }
   visitMapType(type: o.MapType, ctx: EmitterVisitorContext): any {
     ctx.print(`{[key: string]:`);
-    if (isPresent(type.valueType)) {
-      type.valueType.visitType(this, ctx);
-    } else {
-      ctx.print(`any`);
-    }
+    this.visitType(type.valueType, ctx);
     ctx.print(`}`);
     return null;
   }
@@ -294,10 +272,8 @@ class _TsEmitterVisitor extends AbstractEmitterVisitor implements o.TypeVisitor
   private _visitParams(params: o.FnParam[], ctx: EmitterVisitorContext): void {
     this.visitAllObjects((param) => {
       ctx.print(param.name);
-      if (isPresent(param.type)) {
-        ctx.print(`:`);
-        param.type.visitType(this, ctx);
-      }
+      ctx.print(':');
+      this.visitType(param.type, ctx);
     }, params, ctx, ',');
   }
 
diff --git a/modules/@angular/compiler/test/output/ts_emitter_spec.ts b/modules/@angular/compiler/test/output/ts_emitter_spec.ts
index 743f9e0fde..24269ca7bd 100644
--- a/modules/@angular/compiler/test/output/ts_emitter_spec.ts
+++ b/modules/@angular/compiler/test/output/ts_emitter_spec.ts
@@ -46,11 +46,11 @@ export function main() {
     }
 
     it('should declare variables', () => {
-      expect(emitStmt(someVar.set(o.literal(1)).toDeclStmt())).toEqual(`var someVar = 1;`);
+      expect(emitStmt(someVar.set(o.literal(1)).toDeclStmt())).toEqual(`var someVar:any = 1;`);
       expect(emitStmt(someVar.set(o.literal(1)).toDeclStmt(null, [o.StmtModifier.Final])))
-          .toEqual(`const someVar = 1;`);
+          .toEqual(`const someVar:any = 1;`);
       expect(emitStmt(someVar.set(o.literal(1)).toDeclStmt(), ['someVar']))
-          .toEqual(`export var someVar = 1;`);
+          .toEqual(`export var someVar:any = 1;`);
       expect(emitStmt(someVar.set(o.literal(1)).toDeclStmt(o.INT_TYPE)))
           .toEqual(`var someVar:number = 1;`);
     });
@@ -186,7 +186,7 @@ export function main() {
             'try {',
             '  body();',
             '} catch (error) {',
-            '  const stack = error.stack;',
+            '  const stack:any = error.stack;',
             '  catchFn(error,stack);',
             '}'
           ].join('\n'));
@@ -235,7 +235,7 @@ export function main() {
       it('should support declaring fields', () => {
         expect(emitStmt(new o.ClassStmt('SomeClass', null, [new o.ClassField('someField')], [],
                                         null, [])))
-            .toEqual(['class SomeClass {', '  someField: any;', '}'].join('\n'));
+            .toEqual(['class SomeClass {', '  someField:any;', '}'].join('\n'));
         expect(emitStmt(new o.ClassStmt('SomeClass', null,
                                         [new o.ClassField('someField', o.INT_TYPE)], [], null, [])))
             .toEqual(['class SomeClass {', '  someField:number;', '}'].join('\n'));
@@ -249,7 +249,7 @@ export function main() {
       it('should support declaring getters', () => {
         expect(emitStmt(new o.ClassStmt('SomeClass', null, [],
                                         [new o.ClassGetter('someGetter', [])], null, [])))
-            .toEqual(['class SomeClass {', '  get someGetter() {', '  }', '}'].join('\n'));
+            .toEqual(['class SomeClass {', '  get someGetter():any {', '  }', '}'].join('\n'));
         expect(
             emitStmt(new o.ClassStmt('SomeClass', null, [],
                                      [new o.ClassGetter('someGetter', [], o.INT_TYPE)], null, [])))
@@ -258,13 +258,13 @@ export function main() {
                                         [new o.ClassGetter('someGetter', [callSomeMethod])], null,
                                         [])))
             .toEqual(
-                ['class SomeClass {', '  get someGetter() {', '    this.someMethod();', '  }', '}']
+                ['class SomeClass {', '  get someGetter():any {', '    this.someMethod();', '  }', '}']
                     .join('\n'));
         expect(
             emitStmt(new o.ClassStmt(
                 'SomeClass', null, [],
                 [new o.ClassGetter('someGetter', [], null, [o.StmtModifier.Private])], null, [])))
-            .toEqual(['class SomeClass {', '  private get someGetter() {', '  }', '}'].join('\n'));
+            .toEqual(['class SomeClass {', '  private get someGetter():any {', '  }', '}'].join('\n'));
       });
 
       it('should support methods', () => {
diff --git a/modules/@angular/compiler_cli/integrationtest/src/features.ts b/modules/@angular/compiler_cli/integrationtest/src/features.ts
index 42ed71bab7..a9ef563254 100644
--- a/modules/@angular/compiler_cli/integrationtest/src/features.ts
+++ b/modules/@angular/compiler_cli/integrationtest/src/features.ts
@@ -14,7 +14,7 @@ export const SOME_OPAQUE_TOKEN = new OpaqueToken('opaqueToken');
   ]
 })
 export class CompWithProviders {
-  constructor(@Inject('strToken') public ctxProp) {}
+  constructor(@Inject('strToken') public ctxProp: string) {}
 }
 
 @Component({
diff --git a/modules/@angular/compiler_cli/integrationtest/tsconfig.json b/modules/@angular/compiler_cli/integrationtest/tsconfig.json
index 5a4f51baae..9e5615fec1 100644
--- a/modules/@angular/compiler_cli/integrationtest/tsconfig.json
+++ b/modules/@angular/compiler_cli/integrationtest/tsconfig.json
@@ -9,7 +9,7 @@
     "compilerOptions": {
         "target": "es5",
         "experimentalDecorators": true,
-        "noImplicitAny": false,
+        "noImplicitAny": true,
         "moduleResolution": "node",
         "outDir": "../../../../dist/all/@angular/compiler_cli/integrationtest",
         "rootDir": "",