diff --git a/packages/compiler-cli/integrationtest/bazel/injectable_def/app/test/app_spec.ts b/packages/compiler-cli/integrationtest/bazel/injectable_def/app/test/app_spec.ts
index cf01fe5278..793a27c4d6 100644
--- a/packages/compiler-cli/integrationtest/bazel/injectable_def/app/test/app_spec.ts
+++ b/packages/compiler-cli/integrationtest/bazel/injectable_def/app/test/app_spec.ts
@@ -160,6 +160,32 @@ describe('ngInjectableDef Bazel Integration', () => {
     expect(() => TestBed.inject(ChildService).value).toThrowError(/ChildService/);
   });
 
+  it('uses legacy `ngInjectable` property even if it inherits from a class that has `ɵprov` property',
+     () => {
+       @Injectable({
+         providedIn: 'root',
+         useValue: new ParentService('parent'),
+       })
+       class ParentService {
+         constructor(public value: string) {}
+       }
+
+       // ChildServices exteds ParentService but does not have @Injectable
+       class ChildService extends ParentService {
+         constructor(value: string) { super(value); }
+         static ngInjectableDef = {
+           providedIn: 'root',
+           factory: () => new ChildService('child'),
+           token: ChildService,
+         };
+       }
+
+       TestBed.configureTestingModule({});
+       // We are asserting that system throws an error, rather than taking the inherited
+       // annotation.
+       expect(TestBed.inject(ChildService).value).toEqual('child');
+     });
+
   it('NgModule injector understands requests for INJECTABLE', () => {
     TestBed.configureTestingModule({
       providers: [{provide: 'foo', useValue: 'bar'}],
diff --git a/packages/core/src/di/interface/defs.ts b/packages/core/src/di/interface/defs.ts
index ac99be13a0..7a6662371b 100644
--- a/packages/core/src/di/interface/defs.ts
+++ b/packages/core/src/di/interface/defs.ts
@@ -190,14 +190,22 @@ export function ɵɵdefineInjector(options: {factory: () => any, providers?: any
  * @param type A type which may have its own (non-inherited) `ɵprov`.
  */
 export function getInjectableDef<T>(type: any): ɵɵInjectableDef<T>|null {
-  const def = (type[NG_PROV_DEF] || type[NG_INJECTABLE_DEF]) as ɵɵInjectableDef<T>;
-  // The definition read above may come from a base class. `hasOwnProperty` is not sufficient to
-  // distinguish this case, as in older browsers (e.g. IE10) static property inheritance is
-  // implemented by copying the properties.
-  //
-  // Instead, the ɵprov's token is compared to the type, and if they don't match then the
-  // property was not defined directly on the type itself, and was likely inherited. The definition
-  // is only returned if the type matches the def.token.
+  return getOwnDefinition(type, type[NG_PROV_DEF]) ||
+      getOwnDefinition(type, type[NG_INJECTABLE_DEF]);
+}
+
+/**
+ * Return `def` only if it is defined directly on `type` and is not inherited from a base
+ * class of `type`.
+ *
+ * The function `Object.hasOwnProperty` is not sufficient to distinguish this case because in older
+ * browsers (e.g. IE10) static property inheritance is implemented by copying the properties.
+ *
+ * Instead, the definition's `token` is compared to the `type`, and if they don't match then the
+ * property was not defined directly on the type itself, and was likely inherited. The definition
+ * is only returned if the `type` matches the `def.token`.
+ */
+function getOwnDefinition<T>(type: any, def: ɵɵInjectableDef<T>): ɵɵInjectableDef<T>|null {
   return def && def.token === type ? def : null;
 }
 
diff --git a/packages/core/test/bundling/injection/bundle.golden_symbols.json b/packages/core/test/bundling/injection/bundle.golden_symbols.json
index 52891d4105..76e6fcdb57 100644
--- a/packages/core/test/bundling/injection/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/injection/bundle.golden_symbols.json
@@ -131,6 +131,9 @@
   {
     "name": "getNullInjector"
   },
+  {
+    "name": "getOwnDefinition"
+  },
   {
     "name": "getUndecoratedInjectableFactory"
   },
diff --git a/packages/core/test/bundling/todo/bundle.golden_symbols.json b/packages/core/test/bundling/todo/bundle.golden_symbols.json
index cb14f93b75..de1cb1a2db 100644
--- a/packages/core/test/bundling/todo/bundle.golden_symbols.json
+++ b/packages/core/test/bundling/todo/bundle.golden_symbols.json
@@ -737,6 +737,9 @@
   {
     "name": "getOriginalError"
   },
+  {
+    "name": "getOwnDefinition"
+  },
   {
     "name": "getParentInjectorIndex"
   },