diff --git a/packages/common/upgrade/src/utils.ts b/packages/common/upgrade/src/utils.ts
index 97fcc594c18e2..48cba8e2fee97 100644
--- a/packages/common/upgrade/src/utils.ts
+++ b/packages/common/upgrade/src/utils.ts
@@ -31,7 +31,7 @@ export function isAnchor(el: (Node & ParentNode) | Element | null): el is HTMLAn
   return (<HTMLAnchorElement>el).href !== undefined;
 }
 
-export function isPromise(obj: any): obj is Promise<any> {
+export function isPromise<T = any>(obj: any): obj is Promise<T> {
   // allow any Promise/A+ compliant thenable.
   // It's up to the caller to ensure that obj.then conforms to the spec
   return !!obj && typeof obj.then === 'function';
diff --git a/packages/compiler/src/util.ts b/packages/compiler/src/util.ts
index 01819f7225ffe..789219e115234 100644
--- a/packages/compiler/src/util.ts
+++ b/packages/compiler/src/util.ts
@@ -214,7 +214,7 @@ export function resolveForwardRef(type: any): any {
 /**
  * Determine if the argument is shaped like a Promise
  */
-export function isPromise(obj: any): obj is Promise<any> {
+export function isPromise<T = any>(obj: any): obj is Promise<T> {
   // allow any Promise/A+ compliant thenable.
   // It's up to the caller to ensure that obj.then conforms to the spec
   return !!obj && typeof obj.then === 'function';
diff --git a/packages/core/src/util/lang.ts b/packages/core/src/util/lang.ts
index b6631e84d07e1..d69c39a1465ec 100644
--- a/packages/core/src/util/lang.ts
+++ b/packages/core/src/util/lang.ts
@@ -11,7 +11,7 @@ import {Observable} from 'rxjs';
 /**
  * Determine if the argument is shaped like a Promise
  */
-export function isPromise(obj: any): obj is Promise<any> {
+export function isPromise<T = any>(obj: any): obj is Promise<T> {
   // allow any Promise/A+ compliant thenable.
   // It's up to the caller to ensure that obj.then conforms to the spec
   return !!obj && typeof obj.then === 'function';