diff --git a/packages/core/src/change_detection/change_detector_ref.ts b/packages/core/src/change_detection/change_detector_ref.ts
index 823c414a81..6a570af32a 100644
--- a/packages/core/src/change_detection/change_detector_ref.ts
+++ b/packages/core/src/change_detection/change_detector_ref.ts
@@ -108,6 +108,7 @@ export abstract class ChangeDetectorRef {
   abstract reattach(): void;
 
   /** @internal */
+  /** @nocollapse */
   static __NG_ELEMENT_ID__: () => ChangeDetectorRef = () => SWITCH_CHANGE_DETECTOR_REF_FACTORY();
 }
 
diff --git a/packages/core/src/di/injector.ts b/packages/core/src/di/injector.ts
index 675d2fa78e..f15568fb25 100644
--- a/packages/core/src/di/injector.ts
+++ b/packages/core/src/di/injector.ts
@@ -110,6 +110,7 @@ export abstract class Injector {
   });
 
   /** @internal */
+  /** @nocollapse */
   static __NG_ELEMENT_ID__: () => Injector = () => SWITCH_INJECTOR_FACTORY();
 }
 
diff --git a/packages/core/src/linker/element_ref.ts b/packages/core/src/linker/element_ref.ts
index 4bdec33372..4d4e69ba43 100644
--- a/packages/core/src/linker/element_ref.ts
+++ b/packages/core/src/linker/element_ref.ts
@@ -51,6 +51,7 @@ export class ElementRef<T = any> {
   constructor(nativeElement: T) { this.nativeElement = nativeElement; }
 
   /** @internal */
+  /** @nocollapse */
   static __NG_ELEMENT_ID__: () => ElementRef = () => SWITCH_ELEMENT_REF_FACTORY(ElementRef);
 }
 
diff --git a/packages/core/src/linker/template_ref.ts b/packages/core/src/linker/template_ref.ts
index 82d116750f..6c98dd704c 100644
--- a/packages/core/src/linker/template_ref.ts
+++ b/packages/core/src/linker/template_ref.ts
@@ -54,6 +54,7 @@ export abstract class TemplateRef<C> {
   abstract createEmbeddedView(context: C): EmbeddedViewRef<C>;
 
   /** @internal */
+  /** @nocollapse */
   static __NG_ELEMENT_ID__:
       () => TemplateRef<any>| null = () => SWITCH_TEMPLATE_REF_FACTORY(TemplateRef, ElementRef)
 }
diff --git a/packages/core/src/linker/view_container_ref.ts b/packages/core/src/linker/view_container_ref.ts
index ae08347c55..c410b7bfaf 100644
--- a/packages/core/src/linker/view_container_ref.ts
+++ b/packages/core/src/linker/view_container_ref.ts
@@ -145,6 +145,7 @@ export abstract class ViewContainerRef {
   abstract detach(index?: number): ViewRef|null;
 
   /** @internal */
+  /** @nocollapse */
   static __NG_ELEMENT_ID__:
       () => ViewContainerRef = () => SWITCH_VIEW_CONTAINER_REF_FACTORY(ViewContainerRef, ElementRef)
 }
diff --git a/packages/core/src/render/api.ts b/packages/core/src/render/api.ts
index 061f4fcde7..7737518bc3 100644
--- a/packages/core/src/render/api.ts
+++ b/packages/core/src/render/api.ts
@@ -374,6 +374,7 @@ export abstract class Renderer2 {
       callback: (event: any) => boolean | void): () => void;
 
   /** @internal */
+  /** @nocollapse */
   static __NG_ELEMENT_ID__: () => Renderer2 = () => SWITCH_RENDERER2_FACTORY();
 }