diff --git a/mozilla/content/base/public/nsIDocumentViewer.h b/mozilla/content/base/public/nsIDocumentViewer.h
index 8cc9f9def02..8ec4757b63c 100644
--- a/mozilla/content/base/public/nsIDocumentViewer.h
+++ b/mozilla/content/base/public/nsIDocumentViewer.h
@@ -36,6 +36,8 @@ class nsIStyleSheet;
 class nsIDocumentViewer : public nsIContentViewer
 {
 public:
+  NS_DEFINE_STATIC_IID_ACCESSOR(NS_IDOCUMENT_VIEWER_IID)
+
   NS_IMETHOD SetUAStyleSheet(nsIStyleSheet* aUAStyleSheet) = 0;
   
   NS_IMETHOD GetDocument(nsIDocument*& aResult) = 0;
diff --git a/mozilla/layout/base/nsIDocumentViewer.h b/mozilla/layout/base/nsIDocumentViewer.h
index 8cc9f9def02..8ec4757b63c 100644
--- a/mozilla/layout/base/nsIDocumentViewer.h
+++ b/mozilla/layout/base/nsIDocumentViewer.h
@@ -36,6 +36,8 @@ class nsIStyleSheet;
 class nsIDocumentViewer : public nsIContentViewer
 {
 public:
+  NS_DEFINE_STATIC_IID_ACCESSOR(NS_IDOCUMENT_VIEWER_IID)
+
   NS_IMETHOD SetUAStyleSheet(nsIStyleSheet* aUAStyleSheet) = 0;
   
   NS_IMETHOD GetDocument(nsIDocument*& aResult) = 0;
diff --git a/mozilla/layout/base/public/nsIDocumentViewer.h b/mozilla/layout/base/public/nsIDocumentViewer.h
index 8cc9f9def02..8ec4757b63c 100644
--- a/mozilla/layout/base/public/nsIDocumentViewer.h
+++ b/mozilla/layout/base/public/nsIDocumentViewer.h
@@ -36,6 +36,8 @@ class nsIStyleSheet;
 class nsIDocumentViewer : public nsIContentViewer
 {
 public:
+  NS_DEFINE_STATIC_IID_ACCESSOR(NS_IDOCUMENT_VIEWER_IID)
+
   NS_IMETHOD SetUAStyleSheet(nsIStyleSheet* aUAStyleSheet) = 0;
   
   NS_IMETHOD GetDocument(nsIDocument*& aResult) = 0;