diff --git a/modules/@angular/core/src/di/provider.ts b/modules/@angular/core/src/di/provider.ts
index 74cbce3330..9f05bbd983 100644
--- a/modules/@angular/core/src/di/provider.ts
+++ b/modules/@angular/core/src/di/provider.ts
@@ -277,7 +277,7 @@ export interface FactoryProvider {
    * A list of `token`s which need to be resolved by the injector. The list of values is than
    * used as arguments to the `useFactory` function.
    */
-  deps: any[];
+  deps?: any[];
 
   /**
    * If true, than injector returns an array of instances. This is useful to allow multiple
diff --git a/tools/public_api_guard/core/index.d.ts b/tools/public_api_guard/core/index.d.ts
index 8905c946a9..3b4665802e 100644
--- a/tools/public_api_guard/core/index.d.ts
+++ b/tools/public_api_guard/core/index.d.ts
@@ -554,7 +554,7 @@ export declare class ExpressionChangedAfterItHasBeenCheckedException extends Bas
 
 /** @stable */
 export interface FactoryProvider {
-    deps: any[];
+    deps?: any[];
     multi?: boolean;
     provide: any;
     useFactory: Function;