diff --git a/layout/base/nsIDocumentViewerPrint.h b/layout/base/nsIDocumentViewerPrint.h
index 6bec528dd3cc..ad909b6eda85 100644
--- a/layout/base/nsIDocumentViewerPrint.h
+++ b/layout/base/nsIDocumentViewerPrint.h
@@ -69,18 +69,18 @@ NS_DEFINE_STATIC_IID_ACCESSOR(nsIDocumentViewerPrint,
 
 /* Use this macro when declaring classes that implement this interface. */
 #define NS_DECL_NSIDOCUMENTVIEWERPRINT \
-  virtual void     SetIsPrinting(bool aIsPrinting) override; \
-  virtual bool     GetIsPrinting() override; \
-  virtual void     SetIsPrintPreview(bool aIsPrintPreview) override; \
-  virtual bool     GetIsPrintPreview() override; \
-  virtual mozilla::StyleSetHandle CreateStyleSet(nsIDocument* aDocument) override; \
-  virtual void     IncrementDestroyRefCount() override; \
-  virtual void     ReturnToGalleyPresentation() override; \
-  virtual void     OnDonePrinting() override; \
-  virtual bool     IsInitializedForPrintPreview() override; \
-  virtual void     InitializeForPrintPreview() override; \
-  virtual void     SetPrintPreviewPresentation(nsViewManager* aViewManager, \
-                                               nsPresContext* aPresContext, \
-                                               nsIPresShell* aPresShell) override;
+  void     SetIsPrinting(bool aIsPrinting) override; \
+  bool     GetIsPrinting() override; \
+  void     SetIsPrintPreview(bool aIsPrintPreview) override; \
+  bool     GetIsPrintPreview() override; \
+  mozilla::StyleSetHandle CreateStyleSet(nsIDocument* aDocument) override; \
+  void     IncrementDestroyRefCount() override; \
+  void     ReturnToGalleyPresentation() override; \
+  void     OnDonePrinting() override; \
+  bool     IsInitializedForPrintPreview() override; \
+  void     InitializeForPrintPreview() override; \
+  void     SetPrintPreviewPresentation(nsViewManager* aViewManager, \
+                                       nsPresContext* aPresContext, \
+                                       nsIPresShell* aPresShell) override;
 
 #endif /* nsIDocumentViewerPrint_h___ */